Rewrite markdown rendering to blackfriday v2 and rewrite orgmode rendering to go-org (#8560)

* Rewrite markdown rendering to blackfriday v2.0

* Fix style

* Fix go mod with golang 1.13

* Fix blackfriday v2 import

* Inital orgmode renderer migration to go-org

* Vendor go-org dependency

* Ignore errors :/

* Update go-org to latest version

* Update test

* Fix go-org test

* Remove unneeded code

* Fix comments

* Fix markdown test

* Fix blackfriday regression rendering HTML block

17 files changed, 2853 insertions, 0 deletions

diff --git a/vendor/github.com/niklasfasching/go-org/LICENSE b/vendor/github.com/niklasfasching/go-org/LICENSE
new file mode 100644
index 0000000000..22986cae14
--- /dev/null
+++ b/vendor/github.com/niklasfasching/go-org/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2018 Niklas Fasching
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/vendor/github.com/niklasfasching/go-org/org/block.go b/vendor/github.com/niklasfasching/go-org/org/block.go
new file mode 100644
index 0000000000..0e7a526243
--- /dev/null
+++ b/vendor/github.com/niklasfasching/go-org/org/block.go
@@ -0,0 +1,84 @@
+package org
+
+import (
+	"regexp"
+	"strings"
+	"unicode"
+)
+
+type Block struct {
+	Name       string
+	Parameters []string
+	Children   []Node
+}
+
+type Example struct {
+	Children []Node
+}
+
+var exampleLineRegexp = regexp.MustCompile(`^(\s*):(\s(.*)|\s*$)`)
+var beginBlockRegexp = regexp.MustCompile(`(?i)^(\s*)#\+BEGIN_(\w+)(.*)`)
+var endBlockRegexp = regexp.MustCompile(`(?i)^(\s*)#\+END_(\w+)`)
+
+func lexBlock(line string) (token, bool) {
+	if m := beginBlockRegexp.FindStringSubmatch(line); m != nil {
+		return token{"beginBlock", len(m[1]), strings.ToUpper(m[2]), m}, true
+	} else if m := endBlockRegexp.FindStringSubmatch(line); m != nil {
+		return token{"endBlock", len(m[1]), strings.ToUpper(m[2]), m}, true
+	}
+	return nilToken, false
+}
+
+func lexExample(line string) (token, bool) {
+	if m := exampleLineRegexp.FindStringSubmatch(line); m != nil {
+		return token{"example", len(m[1]), m[3], m}, true
+	}
+	return nilToken, false
+}
+
+func isRawTextBlock(name string) bool { return name == "SRC" || name == "EXAMPLE" || name == "EXPORT" }
+
+func (d *Document) parseBlock(i int, parentStop stopFn) (int, Node) {
+	t, start := d.tokens[i], i
+	name, parameters := t.content, strings.Fields(t.matches[3])
+	trim := trimIndentUpTo(d.tokens[i].lvl)
+	stop := func(d *Document, i int) bool {
+		return i >= len(d.tokens) || (d.tokens[i].kind == "endBlock" && d.tokens[i].content == name)
+	}
+	block, i := Block{name, parameters, nil}, i+1
+	if isRawTextBlock(name) {
+		rawText := ""
+		for ; !stop(d, i); i++ {
+			rawText += trim(d.tokens[i].matches[0]) + "\n"
+		}
+		block.Children = d.parseRawInline(rawText)
+	} else {
+		consumed, nodes := d.parseMany(i, stop)
+		block.Children = nodes
+		i += consumed
+	}
+	if i < len(d.tokens) && d.tokens[i].kind == "endBlock" && d.tokens[i].content == name {
+		return i + 1 - start, block
+	}
+	return 0, nil
+}
+
+func (d *Document) parseExample(i int, parentStop stopFn) (int, Node) {
+	example, start := Example{}, i
+	for ; !parentStop(d, i) && d.tokens[i].kind == "example"; i++ {
+		example.Children = append(example.Children, Text{d.tokens[i].content, true})
+	}
+	return i - start, example
+}
+
+func trimIndentUpTo(max int) func(string) string {
+	return func(line string) string {
+		i := 0
+		for ; i < len(line) && i < max && unicode.IsSpace(rune(line[i])); i++ {
+		}
+		return line[i:]
+	}
+}
+
+func (n Example) String() string { return orgWriter.nodesAsString(n) }
+func (n Block) String() string   { return orgWriter.nodesAsString(n) }
diff --git a/vendor/github.com/niklasfasching/go-org/org/document.go b/vendor/github.com/niklasfasching/go-org/org/document.go
new file mode 100644
index 0000000000..e43eb626db
--- /dev/null
+++ b/vendor/github.com/niklasfasching/go-org/org/document.go
@@ -0,0 +1,260 @@
+// Package org is an Org mode syntax processor.
+//
+// It parses plain text into an AST and can export it as HTML or pretty printed Org mode syntax.
+// Further export formats can be defined using the Writer interface.
+//
+// You probably want to start with something like this:
+//   input := strings.NewReader("Your Org mode input")
+//   html, err := org.New().Parse(input, "./").Write(org.NewHTMLWriter())
+//   if err != nil {
+//       log.Fatalf("Something went wrong: %s", err)
+//   }
+//   log.Print(html)
+package org
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"log"
+	"os"
+	"strings"
+)
+
+type Configuration struct {
+	MaxEmphasisNewLines int                                   // Maximum number of newlines inside an emphasis. See org-emphasis-regexp-components newline.
+	AutoLink            bool                                  // Try to convert text passages that look like hyperlinks into hyperlinks.
+	DefaultSettings     map[string]string                     // Default values for settings that are overriden by setting the same key in BufferSettings.
+	Log                 *log.Logger                           // Log is used to print warnings during parsing.
+	ReadFile            func(filename string) ([]byte, error) // ReadFile is used to read e.g. #+INCLUDE files.
+}
+
+// Document contains the parsing results and a pointer to the Configuration.
+type Document struct {
+	*Configuration
+	Path           string // Path of the file containing the parse input - used to resolve relative paths during parsing (e.g. INCLUDE).
+	tokens         []token
+	Nodes          []Node
+	NamedNodes     map[string]Node
+	Outline        Outline           // Outline is a Table Of Contents for the document and contains all sections (headline + content).
+	BufferSettings map[string]string // Settings contains all settings that were parsed from keywords.
+	Error          error
+}
+
+// Node represents a parsed node of the document.
+type Node interface {
+	String() string // String returns the pretty printed Org mode string for the node (see OrgWriter).
+}
+
+type lexFn = func(line string) (t token, ok bool)
+type parseFn = func(*Document, int, stopFn) (int, Node)
+type stopFn = func(*Document, int) bool
+
+type token struct {
+	kind    string
+	lvl     int
+	content string
+	matches []string
+}
+
+var lexFns = []lexFn{
+	lexHeadline,
+	lexDrawer,
+	lexBlock,
+	lexList,
+	lexTable,
+	lexHorizontalRule,
+	lexKeywordOrComment,
+	lexFootnoteDefinition,
+	lexExample,
+	lexText,
+}
+
+var nilToken = token{"nil", -1, "", nil}
+var orgWriter = NewOrgWriter()
+
+// New returns a new Configuration with (hopefully) sane defaults.
+func New() *Configuration {
+	return &Configuration{
+		AutoLink:            true,
+		MaxEmphasisNewLines: 1,
+		DefaultSettings: map[string]string{
+			"TODO":         "TODO | DONE",
+			"EXCLUDE_TAGS": "noexport",
+			"OPTIONS":      "toc:t <:t e:t f:t pri:t todo:t tags:t",
+		},
+		Log:      log.New(os.Stderr, "go-org: ", 0),
+		ReadFile: ioutil.ReadFile,
+	}
+}
+
+// String returns the pretty printed Org mode string for the given nodes (see OrgWriter).
+func String(nodes []Node) string { return orgWriter.nodesAsString(nodes...) }
+
+// Write is called after with an instance of the Writer interface to export a parsed Document into another format.
+func (d *Document) Write(w Writer) (out string, err error) {
+	defer func() {
+		if recovered := recover(); recovered != nil {
+			err = fmt.Errorf("could not write output: %s", recovered)
+		}
+	}()
+	if d.Error != nil {
+		return "", d.Error
+	} else if d.Nodes == nil {
+		return "", fmt.Errorf("could not write output: parse was not called")
+	}
+	w.Before(d)
+	WriteNodes(w, d.Nodes...)
+	w.After(d)
+	return w.String(), err
+}
+
+// Parse parses the input into an AST (and some other helpful fields like Outline).
+// To allow method chaining, errors are stored in document.Error rather than being returned.
+func (c *Configuration) Parse(input io.Reader, path string) (d *Document) {
+	outlineSection := &Section{}
+	d = &Document{
+		Configuration:  c,
+		Outline:        Outline{outlineSection, outlineSection, 0},
+		BufferSettings: map[string]string{},
+		NamedNodes:     map[string]Node{},
+		Path:           path,
+	}
+	defer func() {
+		if recovered := recover(); recovered != nil {
+			d.Error = fmt.Errorf("could not parse input: %v", recovered)
+		}
+	}()
+	if d.tokens != nil {
+		d.Error = fmt.Errorf("parse was called multiple times")
+	}
+	d.tokenize(input)
+	_, nodes := d.parseMany(0, func(d *Document, i int) bool { return i >= len(d.tokens) })
+	d.Nodes = nodes
+	return d
+}
+
+// Silent disables all logging of warnings during parsing.
+func (c *Configuration) Silent() *Configuration {
+	c.Log = log.New(ioutil.Discard, "", 0)
+	return c
+}
+
+func (d *Document) tokenize(input io.Reader) {
+	d.tokens = []token{}
+	scanner := bufio.NewScanner(input)
+	for scanner.Scan() {
+		d.tokens = append(d.tokens, tokenize(scanner.Text()))
+	}
+	if err := scanner.Err(); err != nil {
+		d.Error = fmt.Errorf("could not tokenize input: %s", err)
+	}
+}
+
+// Get returns the value for key in BufferSettings or DefaultSettings if key does not exist in the former
+func (d *Document) Get(key string) string {
+	if v, ok := d.BufferSettings[key]; ok {
+		return v
+	}
+	if v, ok := d.DefaultSettings[key]; ok {
+		return v
+	}
+	return ""
+}
+
+// GetOption returns the value associated to the export option key
+// Currently supported options:
+// - < (export timestamps)
+// - e (export org entities)
+// - f (export footnotes)
+// - toc (export table of content)
+// - todo (export headline todo status)
+// - pri (export headline priority)
+// - tags (export headline tags)
+// see https://orgmode.org/manual/Export-settings.html for more information
+func (d *Document) GetOption(key string) bool {
+	get := func(settings map[string]string) string {
+		for _, field := range strings.Fields(settings["OPTIONS"]) {
+			if strings.HasPrefix(field, key+":") {
+				return field[len(key)+1:]
+			}
+		}
+		return ""
+	}
+	value := get(d.BufferSettings)
+	if value == "" {
+		value = get(d.DefaultSettings)
+	}
+	switch value {
+	case "t":
+		return true
+	case "nil":
+		return false
+	default:
+		d.Log.Printf("Bad value for export option %s (%s)", key, value)
+		return false
+	}
+}
+
+func (d *Document) parseOne(i int, stop stopFn) (consumed int, node Node) {
+	switch d.tokens[i].kind {
+	case "unorderedList", "orderedList":
+		consumed, node = d.parseList(i, stop)
+	case "tableRow", "tableSeparator":
+		consumed, node = d.parseTable(i, stop)
+	case "beginBlock":
+		consumed, node = d.parseBlock(i, stop)
+	case "beginDrawer":
+		consumed, node = d.parseDrawer(i, stop)
+	case "text":
+		consumed, node = d.parseParagraph(i, stop)
+	case "example":
+		consumed, node = d.parseExample(i, stop)
+	case "horizontalRule":
+		consumed, node = d.parseHorizontalRule(i, stop)
+	case "comment":
+		consumed, node = d.parseComment(i, stop)
+	case "keyword":
+		consumed, node = d.parseKeyword(i, stop)
+	case "headline":
+		consumed, node = d.parseHeadline(i, stop)
+	case "footnoteDefinition":
+		consumed, node = d.parseFootnoteDefinition(i, stop)
+	}
+
+	if consumed != 0 {
+		return consumed, node
+	}
+	d.Log.Printf("Could not parse token %#v: Falling back to treating it as plain text.", d.tokens[i])
+	m := plainTextRegexp.FindStringSubmatch(d.tokens[i].matches[0])
+	d.tokens[i] = token{"text", len(m[1]), m[2], m}
+	return d.parseOne(i, stop)
+}
+
+func (d *Document) parseMany(i int, stop stopFn) (int, []Node) {
+	start, nodes := i, []Node{}
+	for i < len(d.tokens) && !stop(d, i) {
+		consumed, node := d.parseOne(i, stop)
+		i += consumed
+		nodes = append(nodes, node)
+	}
+	return i - start, nodes
+}
+
+func (d *Document) addHeadline(headline *Headline) int {
+	current := &Section{Headline: headline}
+	d.Outline.last.add(current)
+	d.Outline.count++
+	d.Outline.last = current
+	return d.Outline.count
+}
+
+func tokenize(line string) token {
+	for _, lexFn := range lexFns {
+		if token, ok := lexFn(line); ok {
+			return token
+		}
+	}
+	panic(fmt.Sprintf("could not lex line: %s", line))
+}
diff --git a/vendor/github.com/niklasfasching/go-org/org/drawer.go b/vendor/github.com/niklasfasching/go-org/org/drawer.go
new file mode 100644
index 0000000000..8bb9974380
--- /dev/null
+++ b/vendor/github.com/niklasfasching/go-org/org/drawer.go
@@ -0,0 +1,97 @@
+package org
+
+import (
+	"regexp"
+	"strings"
+)
+
+type Drawer struct {
+	Name     string
+	Children []Node
+}
+
+type PropertyDrawer struct {
+	Properties [][]string
+}
+
+var beginDrawerRegexp = regexp.MustCompile(`^(\s*):(\S+):\s*$`)
+var endDrawerRegexp = regexp.MustCompile(`^(\s*):END:\s*$`)
+var propertyRegexp = regexp.MustCompile(`^(\s*):(\S+):(\s+(.*)$|$)`)
+
+func lexDrawer(line string) (token, bool) {
+	if m := endDrawerRegexp.FindStringSubmatch(line); m != nil {
+		return token{"endDrawer", len(m[1]), "", m}, true
+	} else if m := beginDrawerRegexp.FindStringSubmatch(line); m != nil {
+		return token{"beginDrawer", len(m[1]), strings.ToUpper(m[2]), m}, true
+	}
+	return nilToken, false
+}
+
+func (d *Document) parseDrawer(i int, parentStop stopFn) (int, Node) {
+	name := strings.ToUpper(d.tokens[i].content)
+	if name == "PROPERTIES" {
+		return d.parsePropertyDrawer(i, parentStop)
+	}
+	drawer, start := Drawer{Name: name}, i
+	i++
+	stop := func(d *Document, i int) bool {
+		if parentStop(d, i) {
+			return true
+		}
+		kind := d.tokens[i].kind
+		return kind == "beginDrawer" || kind == "endDrawer" || kind == "headline"
+	}
+	for {
+		consumed, nodes := d.parseMany(i, stop)
+		i += consumed
+		drawer.Children = append(drawer.Children, nodes...)
+		if i < len(d.tokens) && d.tokens[i].kind == "beginDrawer" {
+			p := Paragraph{[]Node{Text{":" + d.tokens[i].content + ":", false}}}
+			drawer.Children = append(drawer.Children, p)
+			i++
+		} else {
+			break
+		}
+	}
+	if i < len(d.tokens) && d.tokens[i].kind == "endDrawer" {
+		i++
+	}
+	return i - start, drawer
+}
+
+func (d *Document) parsePropertyDrawer(i int, parentStop stopFn) (int, Node) {
+	drawer, start := PropertyDrawer{}, i
+	i++
+	stop := func(d *Document, i int) bool {
+		return parentStop(d, i) || (d.tokens[i].kind != "text" && d.tokens[i].kind != "beginDrawer")
+	}
+	for ; !stop(d, i); i++ {
+		m := propertyRegexp.FindStringSubmatch(d.tokens[i].matches[0])
+		if m == nil {
+			return 0, nil
+		}
+		k, v := strings.ToUpper(m[2]), strings.TrimSpace(m[4])
+		drawer.Properties = append(drawer.Properties, []string{k, v})
+	}
+	if i < len(d.tokens) && d.tokens[i].kind == "endDrawer" {
+		i++
+	} else {
+		return 0, nil
+	}
+	return i - start, drawer
+}
+
+func (d *PropertyDrawer) Get(key string) (string, bool) {
+	if d == nil {
+		return "", false
+	}
+	for _, kvPair := range d.Properties {
+		if kvPair[0] == key {
+			return kvPair[1], true
+		}
+	}
+	return "", false
+}
+
+func (n Drawer) String() string         { return orgWriter.nodesAsString(n) }
+func (n PropertyDrawer) String() string { return orgWriter.nodesAsString(n) }
diff --git a/vendor/github.com/niklasfasching/go-org/org/footnote.go b/vendor/github.com/niklasfasching/go-org/org/footnote.go
new file mode 100644
index 0000000000..660e244386
--- /dev/null
+++ b/vendor/github.com/niklasfasching/go-org/org/footnote.go
@@ -0,0 +1,35 @@
+package org
+
+import (
+	"regexp"
+)
+
+type FootnoteDefinition struct {
+	Name     string
+	Children []Node
+	Inline   bool
+}
+
+var footnoteDefinitionRegexp = regexp.MustCompile(`^\[fn:([\w-]+)\](\s+(.+)|\s*$)`)
+
+func lexFootnoteDefinition(line string) (token, bool) {
+	if m := footnoteDefinitionRegexp.FindStringSubmatch(line); m != nil {
+		return token{"footnoteDefinition", 0, m[1], m}, true
+	}
+	return nilToken, false
+}
+
+func (d *Document) parseFootnoteDefinition(i int, parentStop stopFn) (int, Node) {
+	start, name := i, d.tokens[i].content
+	d.tokens[i] = tokenize(d.tokens[i].matches[2])
+	stop := func(d *Document, i int) bool {
+		return parentStop(d, i) ||
+			(isSecondBlankLine(d, i) && i > start+1) ||
+			d.tokens[i].kind == "headline" || d.tokens[i].kind == "footnoteDefinition"
+	}
+	consumed, nodes := d.parseMany(i, stop)
+	definition := FootnoteDefinition{name, nodes, false}
+	return consumed, definition
+}
+
+func (n FootnoteDefinition) String() string { return orgWriter.nodesAsString(n) }
diff --git a/vendor/github.com/niklasfasching/go-org/org/fuzz.go b/vendor/github.com/niklasfasching/go-org/org/fuzz.go
new file mode 100644
index 0000000000..1e72b5ad92
--- /dev/null
+++ b/vendor/github.com/niklasfasching/go-org/org/fuzz.go
@@ -0,0 +1,27 @@
+// +build gofuzz
+
+package org
+
+import (
+	"bytes"
+	"strings"
+)
+
+// Fuzz function to be used by https://github.com/dvyukov/go-fuzz
+func Fuzz(input []byte) int {
+	conf := New().Silent()
+	d := conf.Parse(bytes.NewReader(input), "")
+	orgOutput, err := d.Write(NewOrgWriter())
+	if err != nil {
+		panic(err)
+	}
+	htmlOutputA, err := d.Write(NewHTMLWriter())
+	if err != nil {
+		panic(err)
+	}
+	htmlOutputB, err := conf.Parse(strings.NewReader(orgOutput), "").Write(NewHTMLWriter())
+	if htmlOutputA != htmlOutputB {
+		panic("rendered org results in different html than original input")
+	}
+	return 0
+}
diff --git a/vendor/github.com/niklasfasching/go-org/org/headline.go b/vendor/github.com/niklasfasching/go-org/org/headline.go
new file mode 100644
index 0000000000..23b986fbc8
--- /dev/null
+++ b/vendor/github.com/niklasfasching/go-org/org/headline.go
@@ -0,0 +1,101 @@
+package org
+
+import (
+	"fmt"
+	"regexp"
+	"strings"
+	"unicode"
+)
+
+type Outline struct {
+	*Section
+	last  *Section
+	count int
+}
+
+type Section struct {
+	Headline *Headline
+	Parent   *Section
+	Children []*Section
+}
+
+type Headline struct {
+	Index      int
+	Lvl        int
+	Status     string
+	Priority   string
+	Properties *PropertyDrawer
+	Title      []Node
+	Tags       []string
+	Children   []Node
+}
+
+var headlineRegexp = regexp.MustCompile(`^([*]+)\s+(.*)`)
+var tagRegexp = regexp.MustCompile(`(.*?)\s+(:[A-Za-z0-9_@#%:]+:\s*$)`)
+
+func lexHeadline(line string) (token, bool) {
+	if m := headlineRegexp.FindStringSubmatch(line); m != nil {
+		return token{"headline", len(m[1]), m[2], m}, true
+	}
+	return nilToken, false
+}
+
+func (d *Document) parseHeadline(i int, parentStop stopFn) (int, Node) {
+	t, headline := d.tokens[i], Headline{}
+	headline.Lvl = t.lvl
+
+	headline.Index = d.addHeadline(&headline)
+
+	text := t.content
+	todoKeywords := strings.FieldsFunc(d.Get("TODO"), func(r rune) bool { return unicode.IsSpace(r) || r == '|' })
+	for _, k := range todoKeywords {
+		if strings.HasPrefix(text, k) && len(text) > len(k) && unicode.IsSpace(rune(text[len(k)])) {
+			headline.Status = k
+			text = text[len(k)+1:]
+			break
+		}
+	}
+
+	if len(text) >= 4 && text[0:2] == "[#" && strings.Contains("ABC", text[2:3]) && text[3] == ']' {
+		headline.Priority = text[2:3]
+		text = strings.TrimSpace(text[4:])
+	}
+
+	if m := tagRegexp.FindStringSubmatch(text); m != nil {
+		text = m[1]
+		headline.Tags = strings.FieldsFunc(m[2], func(r rune) bool { return r == ':' })
+	}
+
+	headline.Title = d.parseInline(text)
+
+	stop := func(d *Document, i int) bool {
+		return parentStop(d, i) || d.tokens[i].kind == "headline" && d.tokens[i].lvl <= headline.Lvl
+	}
+	consumed, nodes := d.parseMany(i+1, stop)
+	if len(nodes) > 0 {
+		if d, ok := nodes[0].(PropertyDrawer); ok {
+			headline.Properties = &d
+			nodes = nodes[1:]
+		}
+	}
+	headline.Children = nodes
+	return consumed + 1, headline
+}
+
+func (h Headline) ID() string {
+	if customID, ok := h.Properties.Get("CUSTOM_ID"); ok {
+		return customID
+	}
+	return fmt.Sprintf("headline-%d", h.Index)
+}
+
+func (parent *Section) add(current *Section) {
+	if parent.Headline == nil || parent.Headline.Lvl < current.Headline.Lvl {
+		parent.Children = append(parent.Children, current)
+		current.Parent = parent
+	} else {
+		parent.Parent.add(current)
+	}
+}
+
+func (n Headline) String() string { return orgWriter.nodesAsString(n) }
diff --git a/vendor/github.com/niklasfasching/go-org/org/html_entity.go b/vendor/github.com/niklasfasching/go-org/org/html_entity.go
new file mode 100644
index 0000000000..484059b28d
--- /dev/null
+++ b/vendor/github.com/niklasfasching/go-org/org/html_entity.go
@@ -0,0 +1,437 @@
+package org
+
+import "strings"
+
+var htmlEntityReplacer *strings.Replacer
+
+func init() {
+	htmlEntities = append(htmlEntities,
+		"---", "—",
+		"--", "–",
+		"...", "…",
+	)
+	htmlEntityReplacer = strings.NewReplacer(htmlEntities...)
+}
+
+/*
+Generated & copied over using the following elisp
+(Setting up go generate seems like a waste for now - I call YAGNI on that one)
+
+(insert (mapconcat
+         (lambda (entity) (concat "`\\" (car entity) "`, `" (nth 6 entity) "`")) ; entity -> utf8
+         (remove-if-not 'listp org-entities)
+         ",\n"))
+*/
+var htmlEntities = []string{
+	`\Agrave`, `À`,
+	`\agrave`, `à`,
+	`\Aacute`, `Á`,
+	`\aacute`, `á`,
+	`\Acirc`, `Â`,
+	`\acirc`, `â`,
+	`\Amacr`, `Ã`,
+	`\amacr`, `ã`,
+	`\Atilde`, `Ã`,
+	`\atilde`, `ã`,
+	`\Auml`, `Ä`,
+	`\auml`, `ä`,
+	`\Aring`, `Å`,
+	`\AA`, `Å`,
+	`\aring`, `å`,
+	`\AElig`, `Æ`,
+	`\aelig`, `æ`,
+	`\Ccedil`, `Ç`,
+	`\ccedil`, `ç`,
+	`\Egrave`, `È`,
+	`\egrave`, `è`,
+	`\Eacute`, `É`,
+	`\eacute`, `é`,
+	`\Ecirc`, `Ê`,
+	`\ecirc`, `ê`,
+	`\Euml`, `Ë`,
+	`\euml`, `ë`,
+	`\Igrave`, `Ì`,
+	`\igrave`, `ì`,
+	`\Iacute`, `Í`,
+	`\iacute`, `í`,
+	`\Icirc`, `Î`,
+	`\icirc`, `î`,
+	`\Iuml`, `Ï`,
+	`\iuml`, `ï`,
+	`\Ntilde`, `Ñ`,
+	`\ntilde`, `ñ`,
+	`\Ograve`, `Ò`,
+	`\ograve`, `ò`,
+	`\Oacute`, `Ó`,
+	`\oacute`, `ó`,
+	`\Ocirc`, `Ô`,
+	`\ocirc`, `ô`,
+	`\Otilde`, `Õ`,
+	`\otilde`, `õ`,
+	`\Ouml`, `Ö`,
+	`\ouml`, `ö`,
+	`\Oslash`, `Ø`,
+	`\oslash`, `ø`,
+	`\OElig`, `Œ`,
+	`\oelig`, `œ`,
+	`\Scaron`, `Š`,
+	`\scaron`, `š`,
+	`\szlig`, `ß`,
+	`\Ugrave`, `Ù`,
+	`\ugrave`, `ù`,
+	`\Uacute`, `Ú`,
+	`\uacute`, `ú`,
+	`\Ucirc`, `Û`,
+	`\ucirc`, `û`,
+	`\Uuml`, `Ü`,
+	`\uuml`, `ü`,
+	`\Yacute`, `Ý`,
+	`\yacute`, `ý`,
+	`\Yuml`, `Ÿ`,
+	`\yuml`, `ÿ`,
+	`\fnof`, `ƒ`,
+	`\real`, `ℜ`,
+	`\image`, `ℑ`,
+	`\weierp`, `℘`,
+	`\ell`, `ℓ`,
+	`\imath`, `ı`,
+	`\jmath`, `ȷ`,
+	`\Alpha`, `Α`,
+	`\alpha`, `α`,
+	`\Beta`, `Β`,
+	`\beta`, `β`,
+	`\Gamma`, `Γ`,
+	`\gamma`, `γ`,
+	`\Delta`, `Δ`,
+	`\delta`, `δ`,
+	`\Epsilon`, `Ε`,
+	`\epsilon`, `ε`,
+	`\varepsilon`, `ε`,
+	`\Zeta`, `Ζ`,
+	`\zeta`, `ζ`,
+	`\Eta`, `Η`,
+	`\eta`, `η`,
+	`\Theta`, `Θ`,
+	`\theta`, `θ`,
+	`\thetasym`, `ϑ`,
+	`\vartheta`, `ϑ`,
+	`\Iota`, `Ι`,
+	`\iota`, `ι`,
+	`\Kappa`, `Κ`,
+	`\kappa`, `κ`,
+	`\Lambda`, `Λ`,
+	`\lambda`, `λ`,
+	`\Mu`, `Μ`,
+	`\mu`, `μ`,
+	`\nu`, `ν`,
+	`\Nu`, `Ν`,
+	`\Xi`, `Ξ`,
+	`\xi`, `ξ`,
+	`\Omicron`, `Ο`,
+	`\omicron`, `ο`,
+	`\Pi`, `Π`,
+	`\pi`, `π`,
+	`\Rho`, `Ρ`,
+	`\rho`, `ρ`,
+	`\Sigma`, `Σ`,
+	`\sigma`, `σ`,
+	`\sigmaf`, `ς`,
+	`\varsigma`, `ς`,
+	`\Tau`, `Τ`,
+	`\Upsilon`, `Υ`,
+	`\upsih`, `ϒ`,
+	`\upsilon`, `υ`,
+	`\Phi`, `Φ`,
+	`\phi`, `ɸ`,
+	`\varphi`, `φ`,
+	`\Chi`, `Χ`,
+	`\chi`, `χ`,
+	`\acutex`, `𝑥́`,
+	`\Psi`, `Ψ`,
+	`\psi`, `ψ`,
+	`\tau`, `τ`,
+	`\Omega`, `Ω`,
+	`\omega`, `ω`,
+	`\piv`, `ϖ`,
+	`\varpi`, `ϖ`,
+	`\partial`, `∂`,
+	`\alefsym`, `ℵ`,
+	`\aleph`, `ℵ`,
+	`\gimel`, `ℷ`,
+	`\beth`, `ב`,
+	`\dalet`, `ד`,
+	`\ETH`, `Ð`,
+	`\eth`, `ð`,
+	`\THORN`, `Þ`,
+	`\thorn`, `þ`,
+	`\dots`, `…`,
+	`\cdots`, `⋯`,
+	`\hellip`, `…`,
+	`\middot`, `·`,
+	`\iexcl`, `¡`,
+	`\iquest`, `¿`,
+	`\shy`, ``,
+	`\ndash`, `–`,
+	`\mdash`, `—`,
+	`\quot`, `"`,
+	`\acute`, `´`,
+	`\ldquo`, `“`,
+	`\rdquo`, `”`,
+	`\bdquo`, `„`,
+	`\lsquo`, `‘`,
+	`\rsquo`, `’`,
+	`\sbquo`, `‚`,
+	`\laquo`, `«`,
+	`\raquo`, `»`,
+	`\lsaquo`, `‹`,
+	`\rsaquo`, `›`,
+	`\circ`, `∘`,
+	`\vert`, `|`,
+	`\vbar`, `|`,
+	`\brvbar`, `¦`,
+	`\S`, `§`,
+	`\sect`, `§`,
+	`\amp`, `&`,
+	`\lt`, `<`,
+	`\gt`, `>`,
+	`\tilde`, `~`,
+	`\slash`, `/`,
+	`\plus`, `+`,
+	`\under`, `_`,
+	`\equal`, `=`,
+	`\asciicirc`, `^`,
+	`\dagger`, `†`,
+	`\dag`, `†`,
+	`\Dagger`, `‡`,
+	`\ddag`, `‡`,
+	`\nbsp`, ` `,
+	`\ensp`, ` `,
+	`\emsp`, ` `,
+	`\thinsp`, ` `,
+	`\curren`, `¤`,
+	`\cent`, `¢`,
+	`\pound`, `£`,
+	`\yen`, `¥`,
+	`\euro`, `€`,
+	`\EUR`, `€`,
+	`\dollar`, `$`,
+	`\USD`, `$`,
+	`\copy`, `©`,
+	`\reg`, `®`,
+	`\trade`, `™`,
+	`\minus`, `−`,
+	`\pm`, `±`,
+	`\plusmn`, `±`,
+	`\times`, `×`,
+	`\frasl`, `⁄`,
+	`\colon`, `:`,
+	`\div`, `÷`,
+	`\frac12`, `½`,
+	`\frac14`, `¼`,
+	`\frac34`, `¾`,
+	`\permil`, `‰`,
+	`\sup1`, `¹`,
+	`\sup2`, `²`,
+	`\sup3`, `³`,
+	`\radic`, `√`,
+	`\sum`, `∑`,
+	`\prod`, `∏`,
+	`\micro`, `µ`,
+	`\macr`, `¯`,
+	`\deg`, `°`,
+	`\prime`, `′`,
+	`\Prime`, `″`,
+	`\infin`, `∞`,
+	`\infty`, `∞`,
+	`\prop`, `∝`,
+	`\propto`, `∝`,
+	`\not`, `¬`,
+	`\neg`, `¬`,
+	`\land`, `∧`,
+	`\wedge`, `∧`,
+	`\lor`, `∨`,
+	`\vee`, `∨`,
+	`\cap`, `∩`,
+	`\cup`, `∪`,
+	`\smile`, `⌣`,
+	`\frown`, `⌢`,
+	`\int`, `∫`,
+	`\therefore`, `∴`,
+	`\there4`, `∴`,
+	`\because`, `∵`,
+	`\sim`, `∼`,
+	`\cong`, `≅`,
+	`\simeq`, `≅`,
+	`\asymp`, `≈`,
+	`\approx`, `≈`,
+	`\ne`, `≠`,
+	`\neq`, `≠`,
+	`\equiv`, `≡`,
+	`\triangleq`, `≜`,
+	`\le`, `≤`,
+	`\leq`, `≤`,
+	`\ge`, `≥`,
+	`\geq`, `≥`,
+	`\lessgtr`, `≶`,
+	`\lesseqgtr`, `⋚`,
+	`\ll`, `≪`,
+	`\Ll`, `⋘`,
+	`\lll`, `⋘`,
+	`\gg`, `≫`,
+	`\Gg`, `⋙`,
+	`\ggg`, `⋙`,
+	`\prec`, `≺`,
+	`\preceq`, `≼`,
+	`\preccurlyeq`, `≼`,
+	`\succ`, `≻`,
+	`\succeq`, `≽`,
+	`\succcurlyeq`, `≽`,
+	`\sub`, `⊂`,
+	`\subset`, `⊂`,
+	`\sup`, `⊃`,
+	`\supset`, `⊃`,
+	`\nsub`, `⊄`,
+	`\sube`, `⊆`,
+	`\nsup`, `⊅`,
+	`\supe`, `⊇`,
+	`\setminus`, `⧵`,
+	`\forall`, `∀`,
+	`\exist`, `∃`,
+	`\exists`, `∃`,
+	`\nexist`, `∄`,
+	`\nexists`, `∄`,
+	`\empty`, `∅`,
+	`\emptyset`, `∅`,
+	`\isin`, `∈`,
+	`\in`, `∈`,
+	`\notin`, `∉`,
+	`\ni`, `∋`,
+	`\nabla`, `∇`,
+	`\ang`, `∠`,
+	`\angle`, `∠`,
+	`\perp`, `⊥`,
+	`\parallel`, `∥`,
+	`\sdot`, `⋅`,
+	`\cdot`, `⋅`,
+	`\lceil`, `⌈`,
+	`\rceil`, `⌉`,
+	`\lfloor`, `⌊`,
+	`\rfloor`, `⌋`,
+	`\lang`, `⟨`,
+	`\rang`, `⟩`,
+	`\langle`, `⟨`,
+	`\rangle`, `⟩`,
+	`\hbar`, `ℏ`,
+	`\mho`, `℧`,
+	`\larr`, `←`,
+	`\leftarrow`, `←`,
+	`\gets`, `←`,
+	`\lArr`, `⇐`,
+	`\Leftarrow`, `⇐`,
+	`\uarr`, `↑`,
+	`\uparrow`, `↑`,
+	`\uArr`, `⇑`,
+	`\Uparrow`, `⇑`,
+	`\rarr`, `→`,
+	`\to`, `→`,
+	`\rightarrow`, `→`,
+	`\rArr`, `⇒`,
+	`\Rightarrow`, `⇒`,
+	`\darr`, `↓`,
+	`\downarrow`, `↓`,
+	`\dArr`, `⇓`,
+	`\Downarrow`, `⇓`,
+	`\harr`, `↔`,
+	`\leftrightarrow`, `↔`,
+	`\hArr`, `⇔`,
+	`\Leftrightarrow`, `⇔`,
+	`\crarr`, `↵`,
+	`\hookleftarrow`, `↵`,
+	`\arccos`, `arccos`,
+	`\arcsin`, `arcsin`,
+	`\arctan`, `arctan`,
+	`\arg`, `arg`,
+	`\cos`, `cos`,
+	`\cosh`, `cosh`,
+	`\cot`, `cot`,
+	`\coth`, `coth`,
+	`\csc`, `csc`,
+	`\deg`, `deg`,
+	`\det`, `det`,
+	`\dim`, `dim`,
+	`\exp`, `exp`,
+	`\gcd`, `gcd`,
+	`\hom`, `hom`,
+	`\inf`, `inf`,
+	`\ker`, `ker`,
+	`\lg`, `lg`,
+	`\lim`, `lim`,
+	`\liminf`, `liminf`,
+	`\limsup`, `limsup`,
+	`\ln`, `ln`,
+	`\log`, `log`,
+	`\max`, `max`,
+	`\min`, `min`,
+	`\Pr`, `Pr`,
+	`\sec`, `sec`,
+	`\sin`, `sin`,
+	`\sinh`, `sinh`,
+	`\sup`, `sup`,
+	`\tan`, `tan`,
+	`\tanh`, `tanh`,
+	`\bull`, `•`,
+	`\bullet`, `•`,
+	`\star`, `⋆`,
+	`\lowast`, `∗`,
+	`\ast`, `*`,
+	`\odot`, `ʘ`,
+	`\oplus`, `⊕`,
+	`\otimes`, `⊗`,
+	`\check`, `✓`,
+	`\checkmark`, `✓`,
+	`\para`, `¶`,
+	`\ordf`, `ª`,
+	`\ordm`, `º`,
+	`\cedil`, `¸`,
+	`\oline`, `‾`,
+	`\uml`, `¨`,
+	`\zwnj`, `‌`,
+	`\zwj`, `‍`,
+	`\lrm`, `‎`,
+	`\rlm`, `‏`,
+	`\smiley`, `☺`,
+	`\blacksmile`, `☻`,
+	`\sad`, `☹`,
+	`\frowny`, `☹`,
+	`\clubs`, `♣`,
+	`\clubsuit`, `♣`,
+	`\spades`, `♠`,
+	`\spadesuit`, `♠`,
+	`\hearts`, `♥`,
+	`\heartsuit`, `♥`,
+	`\diams`, `◆`,
+	`\diamondsuit`, `◆`,
+	`\diamond`, `◆`,
+	`\Diamond`, `◆`,
+	`\loz`, `⧫`,
+	`\_ `, ` `,
+	`\_  `, `  `,
+	`\_   `, `   `,
+	`\_    `, `    `,
+	`\_     `, `     `,
+	`\_      `, `      `,
+	`\_       `, `       `,
+	`\_        `, `        `,
+	`\_         `, `         `,
+	`\_          `, `          `,
+	`\_           `, `           `,
+	`\_            `, `            `,
+	`\_             `, `             `,
+	`\_              `, `              `,
+	`\_               `, `               `,
+	`\_                `, `                `,
+	`\_                 `, `                 `,
+	`\_                  `, `                  `,
+	`\_                   `, `                   `,
+	`\_                    `, `                    `,
+}
diff --git a/vendor/github.com/niklasfasching/go-org/org/html_writer.go b/vendor/github.com/niklasfasching/go-org/org/html_writer.go
new file mode 100644
index 0000000000..90a48c6b4b
--- /dev/null
+++ b/vendor/github.com/niklasfasching/go-org/org/html_writer.go
@@ -0,0 +1,504 @@
+package org
+
+import (
+	"fmt"
+	"html"
+	"log"
+	"regexp"
+	"strings"
+	"unicode"
+
+	h "golang.org/x/net/html"
+	"golang.org/x/net/html/atom"
+)
+
+// HTMLWriter exports an org document into a html document.
+type HTMLWriter struct {
+	ExtendingWriter    Writer
+	HighlightCodeBlock func(source, lang string) string
+
+	strings.Builder
+	document   *Document
+	htmlEscape bool
+	log        *log.Logger
+	footnotes  *footnotes
+}
+
+type footnotes struct {
+	mapping map[string]int
+	list    []*FootnoteDefinition
+}
+
+var emphasisTags = map[string][]string{
+	"/":   []string{"<em>", "</em>"},
+	"*":   []string{"<strong>", "</strong>"},
+	"+":   []string{"<del>", "</del>"},
+	"~":   []string{"<code>", "</code>"},
+	"=":   []string{`<code class="verbatim">`, "</code>"},
+	"_":   []string{`<span style="text-decoration: underline;">`, "</span>"},
+	"_{}": []string{"<sub>", "</sub>"},
+	"^{}": []string{"<sup>", "</sup>"},
+}
+
+var listTags = map[string][]string{
+	"unordered":   []string{"<ul>", "</ul>"},
+	"ordered":     []string{"<ol>", "</ol>"},
+	"descriptive": []string{"<dl>", "</dl>"},
+}
+
+var listItemStatuses = map[string]string{
+	" ": "unchecked",
+	"-": "indeterminate",
+	"X": "checked",
+}
+
+var cleanHeadlineTitleForHTMLAnchorRegexp = regexp.MustCompile(`</?a[^>]*>`) // nested a tags are not valid HTML
+
+func NewHTMLWriter() *HTMLWriter {
+	defaultConfig := New()
+	return &HTMLWriter{
+		document:   &Document{Configuration: defaultConfig},
+		log:        defaultConfig.Log,
+		htmlEscape: true,
+		HighlightCodeBlock: func(source, lang string) string {
+			return fmt.Sprintf("<div class=\"highlight\">\n<pre>\n%s\n</pre>\n</div>", html.EscapeString(source))
+		},
+		footnotes: &footnotes{
+			mapping: map[string]int{},
+		},
+	}
+}
+
+func (w *HTMLWriter) emptyClone() *HTMLWriter {
+	wcopy := *w
+	wcopy.Builder = strings.Builder{}
+	return &wcopy
+}
+
+func (w *HTMLWriter) nodesAsString(nodes ...Node) string {
+	tmp := w.emptyClone()
+	WriteNodes(tmp, nodes...)
+	return tmp.String()
+}
+
+func (w *HTMLWriter) WriterWithExtensions() Writer {
+	if w.ExtendingWriter != nil {
+		return w.ExtendingWriter
+	}
+	return w
+}
+
+func (w *HTMLWriter) Before(d *Document) {
+	w.document = d
+	w.log = d.Log
+	w.WriteOutline(d)
+}
+
+func (w *HTMLWriter) After(d *Document) {
+	w.WriteFootnotes(d)
+}
+
+func (w *HTMLWriter) WriteComment(Comment)               {}
+func (w *HTMLWriter) WritePropertyDrawer(PropertyDrawer) {}
+
+func (w *HTMLWriter) WriteBlock(b Block) {
+	content := ""
+	if isRawTextBlock(b.Name) {
+		exportWriter := w.emptyClone()
+		exportWriter.htmlEscape = false
+		WriteNodes(exportWriter, b.Children...)
+		content = strings.TrimRightFunc(exportWriter.String(), unicode.IsSpace)
+	} else {
+		content = w.nodesAsString(b.Children...)
+	}
+	switch name := b.Name; {
+	case name == "SRC":
+		lang := "text"
+		if len(b.Parameters) >= 1 {
+			lang = strings.ToLower(b.Parameters[0])
+		}
+		content = w.HighlightCodeBlock(content, lang)
+		w.WriteString(fmt.Sprintf("<div class=\"src src-%s\">\n%s\n</div>\n", lang, content))
+	case name == "EXAMPLE":
+		w.WriteString(`<pre class="example">` + "\n" + content + "\n</pre>\n")
+	case name == "EXPORT" && len(b.Parameters) >= 1 && strings.ToLower(b.Parameters[0]) == "html":
+		w.WriteString(content + "\n")
+	case name == "QUOTE":
+		w.WriteString("<blockquote>\n" + content + "</blockquote>\n")
+	case name == "CENTER":
+		w.WriteString(`<div class="center-block" style="text-align: center; margin-left: auto; margin-right: auto;">` + "\n")
+		w.WriteString(content + "</div>\n")
+	default:
+		w.WriteString(fmt.Sprintf(`<div class="%s-block">`, strings.ToLower(b.Name)) + "\n")
+		w.WriteString(content + "</div>\n")
+	}
+}
+
+func (w *HTMLWriter) WriteDrawer(d Drawer) {
+	WriteNodes(w, d.Children...)
+}
+
+func (w *HTMLWriter) WriteKeyword(k Keyword) {
+	if k.Key == "HTML" {
+		w.WriteString(k.Value + "\n")
+	}
+}
+
+func (w *HTMLWriter) WriteInclude(i Include) {
+	WriteNodes(w, i.Resolve())
+}
+
+func (w *HTMLWriter) WriteFootnoteDefinition(f FootnoteDefinition) {
+	w.footnotes.updateDefinition(f)
+}
+
+func (w *HTMLWriter) WriteFootnotes(d *Document) {
+	if !w.document.GetOption("f") || len(w.footnotes.list) == 0 {
+		return
+	}
+	w.WriteString(`<div class="footnotes">` + "\n")
+	w.WriteString(`<hr class="footnotes-separatator">` + "\n")
+	w.WriteString(`<div class="footnote-definitions">` + "\n")
+	for i, definition := range w.footnotes.list {
+		id := i + 1
+		if definition == nil {
+			name := ""
+			for k, v := range w.footnotes.mapping {
+				if v == i {
+					name = k
+				}
+			}
+			w.log.Printf("Missing footnote definition for [fn:%s] (#%d)", name, id)
+			continue
+		}
+		w.WriteString(`<div class="footnote-definition">` + "\n")
+		w.WriteString(fmt.Sprintf(`<sup id="footnote-%d"><a href="#footnote-reference-%d">%d</a></sup>`, id, id, id) + "\n")
+		w.WriteString(`<div class="footnote-body">` + "\n")
+		WriteNodes(w, definition.Children...)
+		w.WriteString("</div>\n</div>\n")
+	}
+	w.WriteString("</div>\n</div>\n")
+}
+
+func (w *HTMLWriter) WriteOutline(d *Document) {
+	if w.document.GetOption("toc") && len(d.Outline.Children) != 0 {
+		w.WriteString("<nav>\n<ul>\n")
+		for _, section := range d.Outline.Children {
+			w.writeSection(section)
+		}
+		w.WriteString("</ul>\n</nav>\n")
+	}
+}
+
+func (w *HTMLWriter) writeSection(section *Section) {
+	// NOTE: To satisfy hugo ExtractTOC() check we cannot use `<li>\n` here. Doesn't really matter, just a note.
+	w.WriteString("<li>")
+	h := section.Headline
+	title := cleanHeadlineTitleForHTMLAnchorRegexp.ReplaceAllString(w.nodesAsString(h.Title...), "")
+	w.WriteString(fmt.Sprintf("<a href=\"#%s\">%s</a>\n", h.ID(), title))
+	if len(section.Children) != 0 {
+		w.WriteString("<ul>\n")
+		for _, section := range section.Children {
+			w.writeSection(section)
+		}
+		w.WriteString("</ul>\n")
+	}
+	w.WriteString("</li>\n")
+}
+
+func (w *HTMLWriter) WriteHeadline(h Headline) {
+	for _, excludeTag := range strings.Fields(w.document.Get("EXCLUDE_TAGS")) {
+		for _, tag := range h.Tags {
+			if excludeTag == tag {
+				return
+			}
+		}
+	}
+
+	w.WriteString(fmt.Sprintf(`<h%d id="%s">`, h.Lvl, h.ID()) + "\n")
+	if w.document.GetOption("todo") && h.Status != "" {
+		w.WriteString(fmt.Sprintf(`<span class="todo">%s</span>`, h.Status) + "\n")
+	}
+	if w.document.GetOption("pri") && h.Priority != "" {
+		w.WriteString(fmt.Sprintf(`<span class="priority">[%s]</span>`, h.Priority) + "\n")
+	}
+
+	WriteNodes(w, h.Title...)
+	if w.document.GetOption("tags") && len(h.Tags) != 0 {
+		tags := make([]string, len(h.Tags))
+		for i, tag := range h.Tags {
+			tags[i] = fmt.Sprintf(`<span>%s</span>`, tag)
+		}
+		w.WriteString("&#xa0;&#xa0;&#xa0;")
+		w.WriteString(fmt.Sprintf(`<span class="tags">%s</span>`, strings.Join(tags, "&#xa0;")))
+	}
+	w.WriteString(fmt.Sprintf("\n</h%d>\n", h.Lvl))
+	WriteNodes(w, h.Children...)
+}
+
+func (w *HTMLWriter) WriteText(t Text) {
+	if !w.htmlEscape {
+		w.WriteString(t.Content)
+	} else if !w.document.GetOption("e") || t.IsRaw {
+		w.WriteString(html.EscapeString(t.Content))
+	} else {
+		w.WriteString(html.EscapeString(htmlEntityReplacer.Replace(t.Content)))
+	}
+}
+
+func (w *HTMLWriter) WriteEmphasis(e Emphasis) {
+	tags, ok := emphasisTags[e.Kind]
+	if !ok {
+		panic(fmt.Sprintf("bad emphasis %#v", e))
+	}
+	w.WriteString(tags[0])
+	WriteNodes(w, e.Content...)
+	w.WriteString(tags[1])
+}
+
+func (w *HTMLWriter) WriteLatexFragment(l LatexFragment) {
+	w.WriteString(l.OpeningPair)
+	WriteNodes(w, l.Content...)
+	w.WriteString(l.ClosingPair)
+}
+
+func (w *HTMLWriter) WriteStatisticToken(s StatisticToken) {
+	w.WriteString(fmt.Sprintf(`<code class="statistic">[%s]</code>`, s.Content))
+}
+
+func (w *HTMLWriter) WriteLineBreak(l LineBreak) {
+	w.WriteString(strings.Repeat("\n", l.Count))
+}
+
+func (w *HTMLWriter) WriteExplicitLineBreak(l ExplicitLineBreak) {
+	w.WriteString("<br>\n")
+}
+
+func (w *HTMLWriter) WriteFootnoteLink(l FootnoteLink) {
+	if !w.document.GetOption("f") {
+		return
+	}
+	i := w.footnotes.add(l)
+	id := i + 1
+	w.WriteString(fmt.Sprintf(`<sup class="footnote-reference"><a id="footnote-reference-%d" href="#footnote-%d">%d</a></sup>`, id, id, id))
+}
+
+func (w *HTMLWriter) WriteTimestamp(t Timestamp) {
+	if !w.document.GetOption("<") {
+		return
+	}
+	w.WriteString(`<span class="timestamp">&lt;`)
+	if t.IsDate {
+		w.WriteString(t.Time.Format(datestampFormat))
+	} else {
+		w.WriteString(t.Time.Format(timestampFormat))
+	}
+	if t.Interval != "" {
+		w.WriteString(" " + t.Interval)
+	}
+	w.WriteString(`&gt;</span>`)
+}
+
+func (w *HTMLWriter) WriteRegularLink(l RegularLink) {
+	url := html.EscapeString(l.URL)
+	if l.Protocol == "file" {
+		url = url[len("file:"):]
+	}
+	description := url
+	if l.Description != nil {
+		description = w.nodesAsString(l.Description...)
+	}
+	switch l.Kind() {
+	case "image":
+		w.WriteString(fmt.Sprintf(`<img src="%s" alt="%s" title="%s" />`, url, description, description))
+	case "video":
+		w.WriteString(fmt.Sprintf(`<video src="%s" title="%s">%s</video>`, url, description, description))
+	default:
+		w.WriteString(fmt.Sprintf(`<a href="%s">%s</a>`, url, description))
+	}
+}
+
+func (w *HTMLWriter) WriteList(l List) {
+	tags, ok := listTags[l.Kind]
+	if !ok {
+		panic(fmt.Sprintf("bad list kind %#v", l))
+	}
+	w.WriteString(tags[0] + "\n")
+	WriteNodes(w, l.Items...)
+	w.WriteString(tags[1] + "\n")
+}
+
+func (w *HTMLWriter) WriteListItem(li ListItem) {
+	if li.Status != "" {
+		w.WriteString(fmt.Sprintf("<li class=\"%s\">\n", listItemStatuses[li.Status]))
+	} else {
+		w.WriteString("<li>\n")
+	}
+	WriteNodes(w, li.Children...)
+	w.WriteString("</li>\n")
+}
+
+func (w *HTMLWriter) WriteDescriptiveListItem(di DescriptiveListItem) {
+	if di.Status != "" {
+		w.WriteString(fmt.Sprintf("<dt class=\"%s\">\n", listItemStatuses[di.Status]))
+	} else {
+		w.WriteString("<dt>\n")
+	}
+
+	if len(di.Term) != 0 {
+		WriteNodes(w, di.Term...)
+	} else {
+		w.WriteString("?")
+	}
+	w.WriteString("\n</dt>\n")
+	w.WriteString("<dd>\n")
+	WriteNodes(w, di.Details...)
+	w.WriteString("</dd>\n")
+}
+
+func (w *HTMLWriter) WriteParagraph(p Paragraph) {
+	if len(p.Children) == 0 {
+		return
+	}
+	w.WriteString("<p>")
+	if _, ok := p.Children[0].(LineBreak); !ok {
+		w.WriteString("\n")
+	}
+	WriteNodes(w, p.Children...)
+	w.WriteString("\n</p>\n")
+}
+
+func (w *HTMLWriter) WriteExample(e Example) {
+	w.WriteString(`<pre class="example">` + "\n")
+	if len(e.Children) != 0 {
+		for _, n := range e.Children {
+			WriteNodes(w, n)
+			w.WriteString("\n")
+		}
+	}
+	w.WriteString("</pre>\n")
+}
+
+func (w *HTMLWriter) WriteHorizontalRule(h HorizontalRule) {
+	w.WriteString("<hr>\n")
+}
+
+func (w *HTMLWriter) WriteNodeWithMeta(n NodeWithMeta) {
+	out := w.nodesAsString(n.Node)
+	if p, ok := n.Node.(Paragraph); ok {
+		if len(p.Children) == 1 && isImageOrVideoLink(p.Children[0]) {
+			out = w.nodesAsString(p.Children[0])
+		}
+	}
+	for _, attributes := range n.Meta.HTMLAttributes {
+		out = w.withHTMLAttributes(out, attributes...) + "\n"
+	}
+	if len(n.Meta.Caption) != 0 {
+		caption := ""
+		for i, ns := range n.Meta.Caption {
+			if i != 0 {
+				caption += " "
+			}
+			caption += w.nodesAsString(ns...)
+		}
+		out = fmt.Sprintf("<figure>\n%s<figcaption>\n%s\n</figcaption>\n</figure>\n", out, caption)
+	}
+	w.WriteString(out)
+}
+
+func (w *HTMLWriter) WriteNodeWithName(n NodeWithName) {
+	WriteNodes(w, n.Node)
+}
+
+func (w *HTMLWriter) WriteTable(t Table) {
+	w.WriteString("<table>\n")
+	beforeFirstContentRow := true
+	for i, row := range t.Rows {
+		if row.IsSpecial || len(row.Columns) == 0 {
+			continue
+		}
+		if beforeFirstContentRow {
+			beforeFirstContentRow = false
+			if i+1 < len(t.Rows) && len(t.Rows[i+1].Columns) == 0 {
+				w.WriteString("<thead>\n")
+				w.writeTableColumns(row.Columns, "th")
+				w.WriteString("</thead>\n<tbody>\n")
+				continue
+			} else {
+				w.WriteString("<tbody>\n")
+			}
+		}
+		w.writeTableColumns(row.Columns, "td")
+	}
+	w.WriteString("</tbody>\n</table>\n")
+}
+
+func (w *HTMLWriter) writeTableColumns(columns []Column, tag string) {
+	w.WriteString("<tr>\n")
+	for _, column := range columns {
+		if column.Align == "" {
+			w.WriteString(fmt.Sprintf("<%s>", tag))
+		} else {
+			w.WriteString(fmt.Sprintf(`<%s class="align-%s">`, tag, column.Align))
+		}
+		WriteNodes(w, column.Children...)
+		w.WriteString(fmt.Sprintf("</%s>\n", tag))
+	}
+	w.WriteString("</tr>\n")
+}
+
+func (w *HTMLWriter) withHTMLAttributes(input string, kvs ...string) string {
+	if len(kvs)%2 != 0 {
+		w.log.Printf("withHTMLAttributes: Len of kvs must be even: %#v", kvs)
+		return input
+	}
+	context := &h.Node{Type: h.ElementNode, Data: "body", DataAtom: atom.Body}
+	nodes, err := h.ParseFragment(strings.NewReader(strings.TrimSpace(input)), context)
+	if err != nil || len(nodes) != 1 {
+		w.log.Printf("withHTMLAttributes: Could not extend attributes of %s: %v (%s)", input, nodes, err)
+		return input
+	}
+	out, node := strings.Builder{}, nodes[0]
+	for i := 0; i < len(kvs)-1; i += 2 {
+		node.Attr = setHTMLAttribute(node.Attr, strings.TrimPrefix(kvs[i], ":"), kvs[i+1])
+	}
+	err = h.Render(&out, nodes[0])
+	if err != nil {
+		w.log.Printf("withHTMLAttributes: Could not extend attributes of %s: %v (%s)", input, node, err)
+		return input
+	}
+	return out.String()
+}
+
+func setHTMLAttribute(attributes []h.Attribute, k, v string) []h.Attribute {
+	for i, a := range attributes {
+		if strings.ToLower(a.Key) == strings.ToLower(k) {
+			switch strings.ToLower(k) {
+			case "class", "style":
+				attributes[i].Val += " " + v
+			default:
+				attributes[i].Val = v
+			}
+			return attributes
+		}
+	}
+	return append(attributes, h.Attribute{Namespace: "", Key: k, Val: v})
+}
+
+func (fs *footnotes) add(f FootnoteLink) int {
+	if i, ok := fs.mapping[f.Name]; ok && f.Name != "" {
+		return i
+	}
+	fs.list = append(fs.list, f.Definition)
+	i := len(fs.list) - 1
+	if f.Name != "" {
+		fs.mapping[f.Name] = i
+	}
+	return i
+}
+
+func (fs *footnotes) updateDefinition(f FootnoteDefinition) {
+	if i, ok := fs.mapping[f.Name]; ok {
+		fs.list[i] = &f
+	}
+}
diff --git a/vendor/github.com/niklasfasching/go-org/org/inline.go b/vendor/github.com/niklasfasching/go-org/org/inline.go
new file mode 100644
index 0000000000..02d5a15341
--- /dev/null
+++ b/vendor/github.com/niklasfasching/go-org/org/inline.go
@@ -0,0 +1,357 @@
+package org
+
+import (
+	"fmt"
+	"path"
+	"regexp"
+	"strings"
+	"time"
+	"unicode"
+)
+
+type Text struct {
+	Content string
+	IsRaw   bool
+}
+
+type LineBreak struct{ Count int }
+type ExplicitLineBreak struct{}
+
+type StatisticToken struct{ Content string }
+
+type Timestamp struct {
+	Time     time.Time
+	IsDate   bool
+	Interval string
+}
+
+type Emphasis struct {
+	Kind    string
+	Content []Node
+}
+
+type LatexFragment struct {
+	OpeningPair string
+	ClosingPair string
+	Content     []Node
+}
+
+type FootnoteLink struct {
+	Name       string
+	Definition *FootnoteDefinition
+}
+
+type RegularLink struct {
+	Protocol    string
+	Description []Node
+	URL         string
+	AutoLink    bool
+}
+
+var validURLCharacters = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~:/?#[]@!$&'()*+,;="
+var autolinkProtocols = regexp.MustCompile(`^(https?|ftp|file)$`)
+var imageExtensionRegexp = regexp.MustCompile(`^[.](png|gif|jpe?g|svg|tiff?)$`)
+var videoExtensionRegexp = regexp.MustCompile(`^[.](webm|mp4)$`)
+
+var subScriptSuperScriptRegexp = regexp.MustCompile(`^([_^]){([^{}]+?)}`)
+var timestampRegexp = regexp.MustCompile(`^<(\d{4}-\d{2}-\d{2})( [A-Za-z]+)?( \d{2}:\d{2})?( \+\d+[dwmy])?>`)
+var footnoteRegexp = regexp.MustCompile(`^\[fn:([\w-]*?)(:(.*?))?\]`)
+var statisticsTokenRegexp = regexp.MustCompile(`^\[(\d+/\d+|\d+%)\]`)
+var latexFragmentRegexp = regexp.MustCompile(`(?s)^\\begin{(\w+)}(.*)\\end{(\w+)}`)
+
+var timestampFormat = "2006-01-02 Mon 15:04"
+var datestampFormat = "2006-01-02 Mon"
+
+var latexFragmentPairs = map[string]string{
+	`\(`: `\)`,
+	`\[`: `\]`,
+	`$$`: `$$`,
+}
+
+func (d *Document) parseInline(input string) (nodes []Node) {
+	previous, current := 0, 0
+	for current < len(input) {
+		rewind, consumed, node := 0, 0, (Node)(nil)
+		switch input[current] {
+		case '^':
+			consumed, node = d.parseSubOrSuperScript(input, current)
+		case '_':
+			consumed, node = d.parseSubScriptOrEmphasis(input, current)
+		case '*', '/', '+':
+			consumed, node = d.parseEmphasis(input, current, false)
+		case '=', '~':
+			consumed, node = d.parseEmphasis(input, current, true)
+		case '[':
+			consumed, node = d.parseOpeningBracket(input, current)
+		case '<':
+			consumed, node = d.parseTimestamp(input, current)
+		case '\\':
+			consumed, node = d.parseExplicitLineBreakOrLatexFragment(input, current)
+		case '$':
+			consumed, node = d.parseLatexFragment(input, current)
+		case '\n':
+			consumed, node = d.parseLineBreak(input, current)
+		case ':':
+			rewind, consumed, node = d.parseAutoLink(input, current)
+			current -= rewind
+		}
+		if consumed != 0 {
+			if current > previous {
+				nodes = append(nodes, Text{input[previous:current], false})
+			}
+			if node != nil {
+				nodes = append(nodes, node)
+			}
+			current += consumed
+			previous = current
+		} else {
+			current++
+		}
+	}
+
+	if previous < len(input) {
+		nodes = append(nodes, Text{input[previous:], false})
+	}
+	return nodes
+}
+
+func (d *Document) parseRawInline(input string) (nodes []Node) {
+	previous, current := 0, 0
+	for current < len(input) {
+		if input[current] == '\n' {
+			consumed, node := d.parseLineBreak(input, current)
+			if current > previous {
+				nodes = append(nodes, Text{input[previous:current], true})
+			}
+			nodes = append(nodes, node)
+			current += consumed
+			previous = current
+		} else {
+			current++
+		}
+	}
+	if previous < len(input) {
+		nodes = append(nodes, Text{input[previous:], true})
+	}
+	return nodes
+}
+
+func (d *Document) parseLineBreak(input string, start int) (int, Node) {
+	i := start
+	for ; i < len(input) && input[i] == '\n'; i++ {
+	}
+	return i - start, LineBreak{i - start}
+}
+
+func (d *Document) parseExplicitLineBreakOrLatexFragment(input string, start int) (int, Node) {
+	switch {
+	case start+2 >= len(input):
+	case input[start+1] == '\\' && start != 0 && input[start-1] != '\n':
+		for i := start + 2; unicode.IsSpace(rune(input[i])); i++ {
+			if i >= len(input) || input[i] == '\n' {
+				return i + 1 - start, ExplicitLineBreak{}
+			}
+		}
+	case input[start+1] == '(' || input[start+1] == '[':
+		return d.parseLatexFragment(input, start)
+	case strings.Index(input[start:], `\begin{`) == 0:
+		if m := latexFragmentRegexp.FindStringSubmatch(input[start:]); m != nil {
+			if open, content, close := m[1], m[2], m[3]; open == close {
+				openingPair, closingPair := `\begin{`+open+`}`, `\end{`+close+`}`
+				i := strings.Index(input[start:], closingPair)
+				return i + len(closingPair), LatexFragment{openingPair, closingPair, d.parseRawInline(content)}
+			}
+		}
+	}
+	return 0, nil
+}
+
+func (d *Document) parseLatexFragment(input string, start int) (int, Node) {
+	if start+2 >= len(input) {
+		return 0, nil
+	}
+	openingPair := input[start : start+2]
+	closingPair := latexFragmentPairs[openingPair]
+	if i := strings.Index(input[start+2:], closingPair); i != -1 {
+		content := d.parseRawInline(input[start+2 : start+2+i])
+		return i + 2 + 2, LatexFragment{openingPair, closingPair, content}
+	}
+	return 0, nil
+}
+
+func (d *Document) parseSubOrSuperScript(input string, start int) (int, Node) {
+	if m := subScriptSuperScriptRegexp.FindStringSubmatch(input[start:]); m != nil {
+		return len(m[2]) + 3, Emphasis{m[1] + "{}", []Node{Text{m[2], false}}}
+	}
+	return 0, nil
+}
+
+func (d *Document) parseSubScriptOrEmphasis(input string, start int) (int, Node) {
+	if consumed, node := d.parseSubOrSuperScript(input, start); consumed != 0 {
+		return consumed, node
+	}
+	return d.parseEmphasis(input, start, false)
+}
+
+func (d *Document) parseOpeningBracket(input string, start int) (int, Node) {
+	if len(input[start:]) >= 2 && input[start] == '[' && input[start+1] == '[' {
+		return d.parseRegularLink(input, start)
+	} else if footnoteRegexp.MatchString(input[start:]) {
+		return d.parseFootnoteReference(input, start)
+	} else if statisticsTokenRegexp.MatchString(input[start:]) {
+		return d.parseStatisticToken(input, start)
+	}
+	return 0, nil
+}
+
+func (d *Document) parseFootnoteReference(input string, start int) (int, Node) {
+	if m := footnoteRegexp.FindStringSubmatch(input[start:]); m != nil {
+		name, definition := m[1], m[3]
+		if name == "" && definition == "" {
+			return 0, nil
+		}
+		link := FootnoteLink{name, nil}
+		if definition != "" {
+			link.Definition = &FootnoteDefinition{name, []Node{Paragraph{d.parseInline(definition)}}, true}
+		}
+		return len(m[0]), link
+	}
+	return 0, nil
+}
+
+func (d *Document) parseStatisticToken(input string, start int) (int, Node) {
+	if m := statisticsTokenRegexp.FindStringSubmatch(input[start:]); m != nil {
+		return len(m[1]) + 2, StatisticToken{m[1]}
+	}
+	return 0, nil
+}
+
+func (d *Document) parseAutoLink(input string, start int) (int, int, Node) {
+	if !d.AutoLink || start == 0 || len(input[start:]) < 3 || input[start:start+3] != "://" {
+		return 0, 0, nil
+	}
+	protocolStart, protocol := start-1, ""
+	for ; protocolStart > 0; protocolStart-- {
+		if !unicode.IsLetter(rune(input[protocolStart])) {
+			protocolStart++
+			break
+		}
+	}
+	if m := autolinkProtocols.FindStringSubmatch(input[protocolStart:start]); m != nil {
+		protocol = m[1]
+	} else {
+		return 0, 0, nil
+	}
+	end := start
+	for ; end < len(input) && strings.ContainsRune(validURLCharacters, rune(input[end])); end++ {
+	}
+	path := input[start:end]
+	if path == "://" {
+		return 0, 0, nil
+	}
+	return len(protocol), len(path + protocol), RegularLink{protocol, nil, protocol + path, true}
+}
+
+func (d *Document) parseRegularLink(input string, start int) (int, Node) {
+	input = input[start:]
+	if len(input) < 3 || input[:2] != "[[" || input[2] == '[' {
+		return 0, nil
+	}
+	end := strings.Index(input, "]]")
+	if end == -1 {
+		return 0, nil
+	}
+	rawLinkParts := strings.Split(input[2:end], "][")
+	description, link := ([]Node)(nil), rawLinkParts[0]
+	if len(rawLinkParts) == 2 {
+		link, description = rawLinkParts[0], d.parseInline(rawLinkParts[1])
+	}
+	if strings.ContainsRune(link, '\n') {
+		return 0, nil
+	}
+	consumed := end + 2
+	protocol, linkParts := "", strings.SplitN(link, ":", 2)
+	if len(linkParts) == 2 {
+		protocol = linkParts[0]
+	}
+	return consumed, RegularLink{protocol, description, link, false}
+}
+
+func (d *Document) parseTimestamp(input string, start int) (int, Node) {
+	if m := timestampRegexp.FindStringSubmatch(input[start:]); m != nil {
+		ddmmyy, hhmm, interval, isDate := m[1], m[3], strings.TrimSpace(m[4]), false
+		if hhmm == "" {
+			hhmm, isDate = "00:00", true
+		}
+		t, err := time.Parse(timestampFormat, fmt.Sprintf("%s Mon %s", ddmmyy, hhmm))
+		if err != nil {
+			return 0, nil
+		}
+		timestamp := Timestamp{t, isDate, interval}
+		return len(m[0]), timestamp
+	}
+	return 0, nil
+}
+
+func (d *Document) parseEmphasis(input string, start int, isRaw bool) (int, Node) {
+	marker, i := input[start], start
+	if !hasValidPreAndBorderChars(input, i) {
+		return 0, nil
+	}
+	for i, consumedNewLines := i+1, 0; i < len(input) && consumedNewLines <= d.MaxEmphasisNewLines; i++ {
+		if input[i] == '\n' {
+			consumedNewLines++
+		}
+
+		if input[i] == marker && i != start+1 && hasValidPostAndBorderChars(input, i) {
+			if isRaw {
+				return i + 1 - start, Emphasis{input[start : start+1], d.parseRawInline(input[start+1 : i])}
+			}
+			return i + 1 - start, Emphasis{input[start : start+1], d.parseInline(input[start+1 : i])}
+		}
+	}
+	return 0, nil
+}
+
+// see org-emphasis-regexp-components (emacs elisp variable)
+
+func hasValidPreAndBorderChars(input string, i int) bool {
+	return (i+1 >= len(input) || isValidBorderChar(rune(input[i+1]))) && (i == 0 || isValidPreChar(rune(input[i-1])))
+}
+
+func hasValidPostAndBorderChars(input string, i int) bool {
+	return (i == 0 || isValidBorderChar(rune(input[i-1]))) && (i+1 >= len(input) || isValidPostChar(rune(input[i+1])))
+}
+
+func isValidPreChar(r rune) bool {
+	return unicode.IsSpace(r) || strings.ContainsRune(`-({'"`, r)
+}
+
+func isValidPostChar(r rune) bool {
+	return unicode.IsSpace(r) || strings.ContainsRune(`-.,:!?;'")}[`, r)
+}
+
+func isValidBorderChar(r rune) bool { return !unicode.IsSpace(r) }
+
+func (l RegularLink) Kind() string {
+	if p := l.Protocol; l.Description != nil || (p != "" && p != "file" && p != "http" && p != "https") {
+		return "regular"
+	}
+	if imageExtensionRegexp.MatchString(path.Ext(l.URL)) {
+		return "image"
+	}
+	if videoExtensionRegexp.MatchString(path.Ext(l.URL)) {
+		return "video"
+	}
+	return "regular"
+}
+
+func (n Text) String() string              { return orgWriter.nodesAsString(n) }
+func (n LineBreak) String() string         { return orgWriter.nodesAsString(n) }
+func (n ExplicitLineBreak) String() string { return orgWriter.nodesAsString(n) }
+func (n StatisticToken) String() string    { return orgWriter.nodesAsString(n) }
+func (n Emphasis) String() string          { return orgWriter.nodesAsString(n) }
+func (n LatexFragment) String() string     { return orgWriter.nodesAsString(n) }
+func (n FootnoteLink) String() string      { return orgWriter.nodesAsString(n) }
+func (n RegularLink) String() string       { return orgWriter.nodesAsString(n) }
+func (n Timestamp) String() string         { return orgWriter.nodesAsString(n) }
diff --git a/vendor/github.com/niklasfasching/go-org/org/keyword.go b/vendor/github.com/niklasfasching/go-org/org/keyword.go
new file mode 100644
index 0000000000..776241797b
--- /dev/null
+++ b/vendor/github.com/niklasfasching/go-org/org/keyword.go
@@ -0,0 +1,184 @@
+package org
+
+import (
+	"bytes"
+	"path/filepath"
+	"regexp"
+	"strings"
+)
+
+type Comment struct{ Content string }
+
+type Keyword struct {
+	Key   string
+	Value string
+}
+
+type NodeWithName struct {
+	Name string
+	Node Node
+}
+
+type NodeWithMeta struct {
+	Node Node
+	Meta Metadata
+}
+
+type Metadata struct {
+	Caption        [][]Node
+	HTMLAttributes [][]string
+}
+
+type Include struct {
+	Keyword
+	Resolve func() Node
+}
+
+var keywordRegexp = regexp.MustCompile(`^(\s*)#\+([^:]+):(\s+(.*)|$)`)
+var commentRegexp = regexp.MustCompile(`^(\s*)#(.*)`)
+
+var includeFileRegexp = regexp.MustCompile(`(?i)^"([^"]+)" (src|example|export) (\w+)$`)
+var attributeRegexp = regexp.MustCompile(`(?:^|\s+)(:[-\w]+)\s+(.*)$`)
+
+func lexKeywordOrComment(line string) (token, bool) {
+	if m := keywordRegexp.FindStringSubmatch(line); m != nil {
+		return token{"keyword", len(m[1]), m[2], m}, true
+	} else if m := commentRegexp.FindStringSubmatch(line); m != nil {
+		return token{"comment", len(m[1]), m[2], m}, true
+	}
+	return nilToken, false
+}
+
+func (d *Document) parseComment(i int, stop stopFn) (int, Node) {
+	return 1, Comment{d.tokens[i].content}
+}
+
+func (d *Document) parseKeyword(i int, stop stopFn) (int, Node) {
+	k := parseKeyword(d.tokens[i])
+	switch k.Key {
+	case "NAME":
+		return d.parseNodeWithName(k, i, stop)
+	case "SETUPFILE":
+		return d.loadSetupFile(k)
+	case "INCLUDE":
+		return d.parseInclude(k)
+	case "CAPTION", "ATTR_HTML":
+		consumed, node := d.parseAffiliated(i, stop)
+		if consumed != 0 {
+			return consumed, node
+		}
+		fallthrough
+	default:
+		if _, ok := d.BufferSettings[k.Key]; ok {
+			d.BufferSettings[k.Key] = strings.Join([]string{d.BufferSettings[k.Key], k.Value}, "\n")
+		} else {
+			d.BufferSettings[k.Key] = k.Value
+		}
+		return 1, k
+	}
+}
+
+func (d *Document) parseNodeWithName(k Keyword, i int, stop stopFn) (int, Node) {
+	if stop(d, i+1) {
+		return 0, nil
+	}
+	consumed, node := d.parseOne(i+1, stop)
+	if consumed == 0 || node == nil {
+		return 0, nil
+	}
+	d.NamedNodes[k.Value] = node
+	return consumed + 1, NodeWithName{k.Value, node}
+}
+
+func (d *Document) parseAffiliated(i int, stop stopFn) (int, Node) {
+	start, meta := i, Metadata{}
+	for ; !stop(d, i) && d.tokens[i].kind == "keyword"; i++ {
+		switch k := parseKeyword(d.tokens[i]); k.Key {
+		case "CAPTION":
+			meta.Caption = append(meta.Caption, d.parseInline(k.Value))
+		case "ATTR_HTML":
+			attributes, rest := []string{}, k.Value
+			for {
+				if k, m := "", attributeRegexp.FindStringSubmatch(rest); m != nil {
+					k, rest = m[1], m[2]
+					attributes = append(attributes, k)
+					if v, m := "", attributeRegexp.FindStringSubmatchIndex(rest); m != nil {
+						v, rest = rest[:m[0]], rest[m[0]:]
+						attributes = append(attributes, v)
+					} else {
+						attributes = append(attributes, strings.TrimSpace(rest))
+						break
+					}
+				} else {
+					break
+				}
+			}
+			meta.HTMLAttributes = append(meta.HTMLAttributes, attributes)
+		default:
+			return 0, nil
+		}
+	}
+	if stop(d, i) {
+		return 0, nil
+	}
+	consumed, node := d.parseOne(i, stop)
+	if consumed == 0 || node == nil {
+		return 0, nil
+	}
+	i += consumed
+	return i - start, NodeWithMeta{node, meta}
+}
+
+func parseKeyword(t token) Keyword {
+	k, v := t.matches[2], t.matches[4]
+	return Keyword{strings.ToUpper(k), strings.TrimSpace(v)}
+}
+
+func (d *Document) parseInclude(k Keyword) (int, Node) {
+	resolve := func() Node {
+		d.Log.Printf("Bad include %#v", k)
+		return k
+	}
+	if m := includeFileRegexp.FindStringSubmatch(k.Value); m != nil {
+		path, kind, lang := m[1], m[2], m[3]
+		if !filepath.IsAbs(path) {
+			path = filepath.Join(filepath.Dir(d.Path), path)
+		}
+		resolve = func() Node {
+			bs, err := d.ReadFile(path)
+			if err != nil {
+				d.Log.Printf("Bad include %#v: %s", k, err)
+				return k
+			}
+			return Block{strings.ToUpper(kind), []string{lang}, d.parseRawInline(string(bs))}
+		}
+	}
+	return 1, Include{k, resolve}
+}
+
+func (d *Document) loadSetupFile(k Keyword) (int, Node) {
+	path := k.Value
+	if !filepath.IsAbs(path) {
+		path = filepath.Join(filepath.Dir(d.Path), path)
+	}
+	bs, err := d.ReadFile(path)
+	if err != nil {
+		d.Log.Printf("Bad setup file: %#v: %s", k, err)
+		return 1, k
+	}
+	setupDocument := d.Configuration.Parse(bytes.NewReader(bs), path)
+	if err := setupDocument.Error; err != nil {
+		d.Log.Printf("Bad setup file: %#v: %s", k, err)
+		return 1, k
+	}
+	for k, v := range setupDocument.BufferSettings {
+		d.BufferSettings[k] = v
+	}
+	return 1, k
+}
+
+func (n Comment) String() string      { return orgWriter.nodesAsString(n) }
+func (n Keyword) String() string      { return orgWriter.nodesAsString(n) }
+func (n NodeWithMeta) String() string { return orgWriter.nodesAsString(n) }
+func (n NodeWithName) String() string { return orgWriter.nodesAsString(n) }
+func (n Include) String() string      { return orgWriter.nodesAsString(n) }
diff --git a/vendor/github.com/niklasfasching/go-org/org/list.go b/vendor/github.com/niklasfasching/go-org/org/list.go
new file mode 100644
index 0000000000..6ba28f6fe4
--- /dev/null
+++ b/vendor/github.com/niklasfasching/go-org/org/list.go
@@ -0,0 +1,114 @@
+package org
+
+import (
+	"fmt"
+	"regexp"
+	"strings"
+	"unicode"
+)
+
+type List struct {
+	Kind  string
+	Items []Node
+}
+
+type ListItem struct {
+	Bullet   string
+	Status   string
+	Children []Node
+}
+
+type DescriptiveListItem struct {
+	Bullet  string
+	Status  string
+	Term    []Node
+	Details []Node
+}
+
+var unorderedListRegexp = regexp.MustCompile(`^(\s*)([+*-])(\s+(.*)|$)`)
+var orderedListRegexp = regexp.MustCompile(`^(\s*)(([0-9]+|[a-zA-Z])[.)])(\s+(.*)|$)`)
+var descriptiveListItemRegexp = regexp.MustCompile(`\s::(\s|$)`)
+var listItemStatusRegexp = regexp.MustCompile(`\[( |X|-)\]\s`)
+
+func lexList(line string) (token, bool) {
+	if m := unorderedListRegexp.FindStringSubmatch(line); m != nil {
+		return token{"unorderedList", len(m[1]), m[4], m}, true
+	} else if m := orderedListRegexp.FindStringSubmatch(line); m != nil {
+		return token{"orderedList", len(m[1]), m[5], m}, true
+	}
+	return nilToken, false
+}
+
+func isListToken(t token) bool {
+	return t.kind == "unorderedList" || t.kind == "orderedList"
+}
+
+func listKind(t token) (string, string) {
+	kind := ""
+	switch bullet := t.matches[2]; {
+	case bullet == "*" || bullet == "+" || bullet == "-":
+		kind = "unordered"
+	case unicode.IsLetter(rune(bullet[0])), unicode.IsDigit(rune(bullet[0])):
+		kind = "ordered"
+	default:
+		panic(fmt.Sprintf("bad list bullet '%s': %#v", bullet, t))
+	}
+	if descriptiveListItemRegexp.MatchString(t.content) {
+		return kind, "descriptive"
+	}
+	return kind, kind
+}
+
+func (d *Document) parseList(i int, parentStop stopFn) (int, Node) {
+	start, lvl := i, d.tokens[i].lvl
+	listMainKind, kind := listKind(d.tokens[i])
+	list := List{Kind: kind}
+	stop := func(*Document, int) bool {
+		if parentStop(d, i) || d.tokens[i].lvl != lvl || !isListToken(d.tokens[i]) {
+			return true
+		}
+		itemMainKind, _ := listKind(d.tokens[i])
+		return itemMainKind != listMainKind
+	}
+	for !stop(d, i) {
+		consumed, node := d.parseListItem(list, i, parentStop)
+		i += consumed
+		list.Items = append(list.Items, node)
+	}
+	return i - start, list
+}
+
+func (d *Document) parseListItem(l List, i int, parentStop stopFn) (int, Node) {
+	start, nodes, bullet := i, []Node{}, d.tokens[i].matches[2]
+	minIndent, dterm, content, status := d.tokens[i].lvl+len(bullet), "", d.tokens[i].content, ""
+	if m := listItemStatusRegexp.FindStringSubmatch(content); m != nil {
+		status, content = m[1], content[len("[ ] "):]
+	}
+	if l.Kind == "descriptive" {
+		if m := descriptiveListItemRegexp.FindStringIndex(content); m != nil {
+			dterm, content = content[:m[0]], content[m[1]:]
+		}
+	}
+
+	d.tokens[i] = tokenize(strings.Repeat(" ", minIndent) + content)
+	stop := func(d *Document, i int) bool {
+		if parentStop(d, i) {
+			return true
+		}
+		t := d.tokens[i]
+		return t.lvl < minIndent && !(t.kind == "text" && t.content == "")
+	}
+	for !stop(d, i) && (i <= start+1 || !isSecondBlankLine(d, i)) {
+		consumed, node := d.parseOne(i, stop)
+		i += consumed
+		nodes = append(nodes, node)
+	}
+	if l.Kind == "descriptive" {
+		return i - start, DescriptiveListItem{bullet, status, d.parseInline(dterm), nodes}
+	}
+	return i - start, ListItem{bullet, status, nodes}
+}
+
+func (n List) String() string                { return orgWriter.nodesAsString(n) }
+func (n ListItem) String() string            { return orgWriter.nodesAsString(n) }
+func (n DescriptiveListItem) String() string { return orgWriter.nodesAsString(n) }
diff --git a/vendor/github.com/niklasfasching/go-org/org/org_writer.go b/vendor/github.com/niklasfasching/go-org/org/org_writer.go
new file mode 100644
index 0000000000..d574cda527
--- /dev/null
+++ b/vendor/github.com/niklasfasching/go-org/org/org_writer.go
@@ -0,0 +1,334 @@
+package org
+
+import (
+	"fmt"
+	"strings"
+	"unicode"
+	"unicode/utf8"
+)
+
+// OrgWriter export an org document into pretty printed org document.
+type OrgWriter struct {
+	ExtendingWriter Writer
+	TagsColumn      int
+
+	strings.Builder
+	indent string
+}
+
+var emphasisOrgBorders = map[string][]string{
+	"_":   []string{"_", "_"},
+	"*":   []string{"*", "*"},
+	"/":   []string{"/", "/"},
+	"+":   []string{"+", "+"},
+	"~":   []string{"~", "~"},
+	"=":   []string{"=", "="},
+	"_{}": []string{"_{", "}"},
+	"^{}": []string{"^{", "}"},
+}
+
+func NewOrgWriter() *OrgWriter {
+	return &OrgWriter{
+		TagsColumn: 77,
+	}
+}
+
+func (w *OrgWriter) WriterWithExtensions() Writer {
+	if w.ExtendingWriter != nil {
+		return w.ExtendingWriter
+	}
+	return w
+}
+
+func (w *OrgWriter) Before(d *Document) {}
+func (w *OrgWriter) After(d *Document)  {}
+
+func (w *OrgWriter) emptyClone() *OrgWriter {
+	wcopy := *w
+	wcopy.Builder = strings.Builder{}
+	return &wcopy
+}
+
+func (w *OrgWriter) nodesAsString(nodes ...Node) string {
+	tmp := w.emptyClone()
+	WriteNodes(tmp, nodes...)
+	return tmp.String()
+}
+
+func (w *OrgWriter) WriteHeadline(h Headline) {
+	tmp := w.emptyClone()
+	tmp.WriteString(strings.Repeat("*", h.Lvl))
+	if h.Status != "" {
+		tmp.WriteString(" " + h.Status)
+	}
+	if h.Priority != "" {
+		tmp.WriteString(" [#" + h.Priority + "]")
+	}
+	tmp.WriteString(" ")
+	WriteNodes(tmp, h.Title...)
+	hString := tmp.String()
+	if len(h.Tags) != 0 {
+		tString := ":" + strings.Join(h.Tags, ":") + ":"
+		if n := w.TagsColumn - len(tString) - len(hString); n > 0 {
+			w.WriteString(hString + strings.Repeat(" ", n) + tString)
+		} else {
+			w.WriteString(hString + " " + tString)
+		}
+	} else {
+		w.WriteString(hString)
+	}
+	w.WriteString("\n")
+	if len(h.Children) != 0 {
+		w.WriteString(w.indent)
+	}
+	if h.Properties != nil {
+		WriteNodes(w, *h.Properties)
+	}
+	WriteNodes(w, h.Children...)
+}
+
+func (w *OrgWriter) WriteBlock(b Block) {
+	w.WriteString(w.indent + "#+BEGIN_" + b.Name)
+	if len(b.Parameters) != 0 {
+		w.WriteString(" " + strings.Join(b.Parameters, " "))
+	}
+	w.WriteString("\n")
+	if isRawTextBlock(b.Name) {
+		w.WriteString(w.indent)
+	}
+	WriteNodes(w, b.Children...)
+	if !isRawTextBlock(b.Name) {
+		w.WriteString(w.indent)
+	}
+	w.WriteString("#+END_" + b.Name + "\n")
+}
+
+func (w *OrgWriter) WriteDrawer(d Drawer) {
+	w.WriteString(w.indent + ":" + d.Name + ":\n")
+	WriteNodes(w, d.Children...)
+	w.WriteString(w.indent + ":END:\n")
+}
+
+func (w *OrgWriter) WritePropertyDrawer(d PropertyDrawer) {
+	w.WriteString(":PROPERTIES:\n")
+	for _, kvPair := range d.Properties {
+		k, v := kvPair[0], kvPair[1]
+		if v != "" {
+			v = " " + v
+		}
+		w.WriteString(fmt.Sprintf(":%s:%s\n", k, v))
+	}
+	w.WriteString(":END:\n")
+}
+
+func (w *OrgWriter) WriteFootnoteDefinition(f FootnoteDefinition) {
+	w.WriteString(fmt.Sprintf("[fn:%s]", f.Name))
+	content := w.nodesAsString(f.Children...)
+	if content != "" && !unicode.IsSpace(rune(content[0])) {
+		w.WriteString(" ")
+	}
+	w.WriteString(content)
+}
+
+func (w *OrgWriter) WriteParagraph(p Paragraph) {
+	content := w.nodesAsString(p.Children...)
+	if len(content) > 0 && content[0] != '\n' {
+		w.WriteString(w.indent)
+	}
+	w.WriteString(content + "\n")
+}
+
+func (w *OrgWriter) WriteExample(e Example) {
+	for _, n := range e.Children {
+		w.WriteString(w.indent + ":")
+		if content := w.nodesAsString(n); content != "" {
+			w.WriteString(" " + content)
+		}
+		w.WriteString("\n")
+	}
+}
+
+func (w *OrgWriter) WriteKeyword(k Keyword) {
+	w.WriteString(w.indent + "#+" + k.Key + ":")
+	if k.Value != "" {
+		w.WriteString(" " + k.Value)
+	}
+	w.WriteString("\n")
+}
+
+func (w *OrgWriter) WriteInclude(i Include) {
+	w.WriteKeyword(i.Keyword)
+}
+
+func (w *OrgWriter) WriteNodeWithMeta(n NodeWithMeta) {
+	for _, ns := range n.Meta.Caption {
+		w.WriteString("#+CAPTION: ")
+		WriteNodes(w, ns...)
+		w.WriteString("\n")
+	}
+	for _, attributes := range n.Meta.HTMLAttributes {
+		w.WriteString("#+ATTR_HTML: ")
+		w.WriteString(strings.Join(attributes, " ") + "\n")
+	}
+	WriteNodes(w, n.Node)
+}
+
+func (w *OrgWriter) WriteNodeWithName(n NodeWithName) {
+	w.WriteString(fmt.Sprintf("#+NAME: %s\n", n.Name))
+	WriteNodes(w, n.Node)
+}
+
+func (w *OrgWriter) WriteComment(c Comment) {
+	w.WriteString(w.indent + "#" + c.Content + "\n")
+}
+
+func (w *OrgWriter) WriteList(l List) { WriteNodes(w, l.Items...) }
+
+func (w *OrgWriter) WriteListItem(li ListItem) {
+	liWriter := w.emptyClone()
+	liWriter.indent = w.indent + strings.Repeat(" ", len(li.Bullet)+1)
+	WriteNodes(liWriter, li.Children...)
+	content := strings.TrimPrefix(liWriter.String(), liWriter.indent)
+	w.WriteString(w.indent + li.Bullet)
+	if li.Status != "" {
+		w.WriteString(fmt.Sprintf(" [%s]", li.Status))
+	}
+	if len(content) > 0 && content[0] == '\n' {
+		w.WriteString(content)
+	} else {
+		w.WriteString(" " + content)
+	}
+}
+
+func (w *OrgWriter) WriteDescriptiveListItem(di DescriptiveListItem) {
+	w.WriteString(w.indent + di.Bullet)
+	if di.Status != "" {
+		w.WriteString(fmt.Sprintf(" [%s]", di.Status))
+	}
+	indent := w.indent + strings.Repeat(" ", len(di.Bullet)+1)
+	if len(di.Term) != 0 {
+		term := w.nodesAsString(di.Term...)
+		w.WriteString(" " + term + " ::")
+		indent = indent + strings.Repeat(" ", len(term)+4)
+	}
+	diWriter := w.emptyClone()
+	diWriter.indent = indent
+	WriteNodes(diWriter, di.Details...)
+	details := strings.TrimPrefix(diWriter.String(), diWriter.indent)
+	if len(details) > 0 && details[0] == '\n' {
+		w.WriteString(details)
+	} else {
+		w.WriteString(" " + details)
+	}
+}
+
+func (w *OrgWriter) WriteTable(t Table) {
+	for _, row := range t.Rows {
+		w.WriteString(w.indent)
+		if len(row.Columns) == 0 {
+			w.WriteString(`|`)
+			for i := 0; i < len(t.ColumnInfos); i++ {
+				w.WriteString(strings.Repeat("-", t.ColumnInfos[i].Len+2))
+				if i < len(t.ColumnInfos)-1 {
+					w.WriteString("+")
+				}
+			}
+			w.WriteString(`|`)
+
+		} else {
+			w.WriteString(`|`)
+			for _, column := range row.Columns {
+				w.WriteString(` `)
+				content := w.nodesAsString(column.Children...)
+				if content == "" {
+					content = " "
+				}
+				n := column.Len - utf8.RuneCountInString(content)
+				if n < 0 {
+					n = 0
+				}
+				if column.Align == "center" {
+					if n%2 != 0 {
+						w.WriteString(" ")
+					}
+					w.WriteString(strings.Repeat(" ", n/2) + content + strings.Repeat(" ", n/2))
+				} else if column.Align == "right" {
+					w.WriteString(strings.Repeat(" ", n) + content)
+				} else {
+					w.WriteString(content + strings.Repeat(" ", n))
+				}
+				w.WriteString(` |`)
+			}
+		}
+		w.WriteString("\n")
+	}
+}
+
+func (w *OrgWriter) WriteHorizontalRule(hr HorizontalRule) {
+	w.WriteString(w.indent + "-----\n")
+}
+
+func (w *OrgWriter) WriteText(t Text) { w.WriteString(t.Content) }
+
+func (w *OrgWriter) WriteEmphasis(e Emphasis) {
+	borders, ok := emphasisOrgBorders[e.Kind]
+	if !ok {
+		panic(fmt.Sprintf("bad emphasis %#v", e))
+	}
+	w.WriteString(borders[0])
+	WriteNodes(w, e.Content...)
+	w.WriteString(borders[1])
+}
+
+func (w *OrgWriter) WriteLatexFragment(l LatexFragment) {
+	w.WriteString(l.OpeningPair)
+	WriteNodes(w, l.Content...)
+	w.WriteString(l.ClosingPair)
+}
+
+func (w *OrgWriter) WriteStatisticToken(s StatisticToken) {
+	w.WriteString(fmt.Sprintf("[%s]", s.Content))
+}
+
+func (w *OrgWriter) WriteLineBreak(l LineBreak) {
+	w.WriteString(strings.Repeat("\n"+w.indent, l.Count))
+}
+
+func (w *OrgWriter) WriteExplicitLineBreak(l ExplicitLineBreak) {
+	w.WriteString(`\\` + "\n" + w.indent)
+}
+
+func (w *OrgWriter) WriteTimestamp(t Timestamp) {
+	w.WriteString("<")
+	if t.IsDate {
+		w.WriteString(t.Time.Format(datestampFormat))
+	} else {
+		w.WriteString(t.Time.Format(timestampFormat))
+	}
+	if t.Interval != "" {
+		w.WriteString(" " + t.Interval)
+	}
+	w.WriteString(">")
+}
+
+func (w *OrgWriter) WriteFootnoteLink(l FootnoteLink) {
+	w.WriteString("[fn:" + l.Name)
+	if l.Definition != nil {
+		w.WriteString(":")
+		WriteNodes(w, l.Definition.Children[0].(Paragraph).Children...)
+	}
+	w.WriteString("]")
+}
+
+func (w *OrgWriter) WriteRegularLink(l RegularLink) {
+	if l.AutoLink {
+		w.WriteString(l.URL)
+	} else if l.Description == nil {
+		w.WriteString(fmt.Sprintf("[[%s]]", l.URL))
+	} else {
+		descriptionWriter := w.emptyClone()
+		WriteNodes(descriptionWriter, l.Description...)
+		description := descriptionWriter.String()
+		w.WriteString(fmt.Sprintf("[[%s][%s]]", l.URL, description))
+	}
+}
diff --git a/vendor/github.com/niklasfasching/go-org/org/paragraph.go b/vendor/github.com/niklasfasching/go-org/org/paragraph.go
new file mode 100644
index 0000000000..b7d3ea92ce
--- /dev/null
+++ b/vendor/github.com/niklasfasching/go-org/org/paragraph.go
@@ -0,0 +1,46 @@
+package org
+
+import (
+	"regexp"
+	"strings"
+)
+
+type Paragraph struct{ Children []Node }
+type HorizontalRule struct{}
+
+var horizontalRuleRegexp = regexp.MustCompile(`^(\s*)-{5,}\s*$`)
+var plainTextRegexp = regexp.MustCompile(`^(\s*)(.*)`)
+
+func lexText(line string) (token, bool) {
+	if m := plainTextRegexp.FindStringSubmatch(line); m != nil {
+		return token{"text", len(m[1]), m[2], m}, true
+	}
+	return nilToken, false
+}
+
+func lexHorizontalRule(line string) (token, bool) {
+	if m := horizontalRuleRegexp.FindStringSubmatch(line); m != nil {
+		return token{"horizontalRule", len(m[1]), "", m}, true
+	}
+	return nilToken, false
+}
+
+func (d *Document) parseParagraph(i int, parentStop stopFn) (int, Node) {
+	lines, start := []string{d.tokens[i].content}, i
+	i++
+	stop := func(d *Document, i int) bool {
+		return parentStop(d, i) || d.tokens[i].kind != "text" || d.tokens[i].content == ""
+	}
+	for ; !stop(d, i); i++ {
+		lines = append(lines, d.tokens[i].content)
+	}
+	consumed := i - start
+	return consumed, Paragraph{d.parseInline(strings.Join(lines, "\n"))}
+}
+
+func (d *Document) parseHorizontalRule(i int, parentStop stopFn) (int, Node) {
+	return 1, HorizontalRule{}
+}
+
+func (n Paragraph) String() string      { return orgWriter.nodesAsString(n) }
+func (n HorizontalRule) String() string { return orgWriter.nodesAsString(n) }
diff --git a/vendor/github.com/niklasfasching/go-org/org/table.go b/vendor/github.com/niklasfasching/go-org/org/table.go
new file mode 100644
index 0000000000..a404e1a9f2
--- /dev/null
+++ b/vendor/github.com/niklasfasching/go-org/org/table.go
@@ -0,0 +1,130 @@
+package org
+
+import (
+	"regexp"
+	"strconv"
+	"strings"
+	"unicode/utf8"
+)
+
+type Table struct {
+	Rows        []Row
+	ColumnInfos []ColumnInfo
+}
+
+type Row struct {
+	Columns   []Column
+	IsSpecial bool
+}
+
+type Column struct {
+	Children []Node
+	*ColumnInfo
+}
+
+type ColumnInfo struct {
+	Align string
+	Len   int
+}
+
+var tableSeparatorRegexp = regexp.MustCompile(`^(\s*)(\|[+-|]*)\s*$`)
+var tableRowRegexp = regexp.MustCompile(`^(\s*)(\|.*)`)
+
+var columnAlignRegexp = regexp.MustCompile(`^<(l|c|r)>$`)
+
+func lexTable(line string) (token, bool) {
+	if m := tableSeparatorRegexp.FindStringSubmatch(line); m != nil {
+		return token{"tableSeparator", len(m[1]), m[2], m}, true
+	} else if m := tableRowRegexp.FindStringSubmatch(line); m != nil {
+		return token{"tableRow", len(m[1]), m[2], m}, true
+	}
+	return nilToken, false
+}
+
+func (d *Document) parseTable(i int, parentStop stopFn) (int, Node) {
+	rawRows, start := [][]string{}, i
+	for ; !parentStop(d, i); i++ {
+		if t := d.tokens[i]; t.kind == "tableRow" {
+			rawRow := strings.FieldsFunc(d.tokens[i].content, func(r rune) bool { return r == '|' })
+			for i := range rawRow {
+				rawRow[i] = strings.TrimSpace(rawRow[i])
+			}
+			rawRows = append(rawRows, rawRow)
+		} else if t.kind == "tableSeparator" {
+			rawRows = append(rawRows, nil)
+		} else {
+			break
+		}
+	}
+
+	table := Table{nil, getColumnInfos(rawRows)}
+	for _, rawColumns := range rawRows {
+		row := Row{nil, isSpecialRow(rawColumns)}
+		if len(rawColumns) != 0 {
+			for i := range table.ColumnInfos {
+				column := Column{nil, &table.ColumnInfos[i]}
+				if i < len(rawColumns) {
+					column.Children = d.parseInline(rawColumns[i])
+				}
+				row.Columns = append(row.Columns, column)
+			}
+		}
+		table.Rows = append(table.Rows, row)
+	}
+	return i - start, table
+}
+
+func getColumnInfos(rows [][]string) []ColumnInfo {
+	columnCount := 0
+	for _, columns := range rows {
+		if n := len(columns); n > columnCount {
+			columnCount = n
+		}
+	}
+
+	columnInfos := make([]ColumnInfo, columnCount)
+	for i := 0; i < columnCount; i++ {
+		countNumeric, countNonNumeric := 0, 0
+		for _, columns := range rows {
+			if i >= len(columns) {
+				continue
+			}
+
+			if n := utf8.RuneCountInString(columns[i]); n > columnInfos[i].Len {
+				columnInfos[i].Len = n
+			}
+
+			if m := columnAlignRegexp.FindStringSubmatch(columns[i]); m != nil && isSpecialRow(columns) {
+				switch m[1] {
+				case "l":
+					columnInfos[i].Align = "left"
+				case "c":
+					columnInfos[i].Align = "center"
+				case "r":
+					columnInfos[i].Align = "right"
+				}
+			} else if _, err := strconv.ParseFloat(columns[i], 32); err == nil {
+				countNumeric++
+			} else if strings.TrimSpace(columns[i]) != "" {
+				countNonNumeric++
+			}
+		}
+
+		if columnInfos[i].Align == "" && countNumeric >= countNonNumeric {
+			columnInfos[i].Align = "right"
+		}
+	}
+	return columnInfos
+}
+
+func isSpecialRow(rawColumns []string) bool {
+	isAlignRow := true
+	for _, rawColumn := range rawColumns {
+		if !columnAlignRegexp.MatchString(rawColumn) && rawColumn != "" {
+			isAlignRow = false
+		}
+	}
+	return isAlignRow
+}
+
+func (n Table) String() string { return orgWriter.nodesAsString(n) }
diff --git a/vendor/github.com/niklasfasching/go-org/org/util.go b/vendor/github.com/niklasfasching/go-org/org/util.go
new file mode 100644
index 0000000000..c25bf27ee2
--- /dev/null
+++ b/vendor/github.com/niklasfasching/go-org/org/util.go
@@ -0,0 +1,19 @@
+package org
+
+func isSecondBlankLine(d *Document, i int) bool {
+	if i-1 <= 0 {
+		return false
+	}
+	t1, t2 := d.tokens[i-1], d.tokens[i]
+	if t1.kind == "text" && t2.kind == "text" && t1.content == "" && t2.content == "" {
+		return true
+	}
+	return false
+}
+
+func isImageOrVideoLink(n Node) bool {
+	if l, ok := n.(RegularLink); ok && l.Kind() == "video" || l.Kind() == "image" {
+		return true
+	}
+	return false
+}
diff --git a/vendor/github.com/niklasfasching/go-org/org/writer.go b/vendor/github.com/niklasfasching/go-org/org/writer.go
new file mode 100644
index 0000000000..c4aebd69f5
--- /dev/null
+++ b/vendor/github.com/niklasfasching/go-org/org/writer.go
@@ -0,0 +1,103 @@
+package org
+
+import "fmt"
+
+// Writer is the interface that is used to export a parsed document into a new format. See Document.Write().
+type Writer interface {
+	Before(*Document) // Before is called before any nodes are passed to the writer.
+	After(*Document)  // After is called after all nodes have been passed to the writer.
+	String() string   // String is called at the very end to retrieve the final output.
+
+	WriterWithExtensions() Writer
+
+	WriteKeyword(Keyword)
+	WriteInclude(Include)
+	WriteComment(Comment)
+	WriteNodeWithMeta(NodeWithMeta)
+	WriteNodeWithName(NodeWithName)
+	WriteHeadline(Headline)
+	WriteBlock(Block)
+	WriteExample(Example)
+	WriteDrawer(Drawer)
+	WritePropertyDrawer(PropertyDrawer)
+	WriteList(List)
+	WriteListItem(ListItem)
+	WriteDescriptiveListItem(DescriptiveListItem)
+	WriteTable(Table)
+	WriteHorizontalRule(HorizontalRule)
+	WriteParagraph(Paragraph)
+	WriteText(Text)
+	WriteEmphasis(Emphasis)
+	WriteLatexFragment(LatexFragment)
+	WriteStatisticToken(StatisticToken)
+	WriteExplicitLineBreak(ExplicitLineBreak)
+	WriteLineBreak(LineBreak)
+	WriteRegularLink(RegularLink)
+	WriteTimestamp(Timestamp)
+	WriteFootnoteLink(FootnoteLink)
+	WriteFootnoteDefinition(FootnoteDefinition)
+}
+
+func WriteNodes(w Writer, nodes ...Node) {
+	w = w.WriterWithExtensions()
+	for _, n := range nodes {
+		switch n := n.(type) {
+		case Keyword:
+			w.WriteKeyword(n)
+		case Include:
+			w.WriteInclude(n)
+		case Comment:
+			w.WriteComment(n)
+		case NodeWithMeta:
+			w.WriteNodeWithMeta(n)
+		case NodeWithName:
+			w.WriteNodeWithName(n)
+		case Headline:
+			w.WriteHeadline(n)
+		case Block:
+			w.WriteBlock(n)
+		case Example:
+			w.WriteExample(n)
+		case Drawer:
+			w.WriteDrawer(n)
+		case PropertyDrawer:
+			w.WritePropertyDrawer(n)
+		case List:
+			w.WriteList(n)
+		case ListItem:
+			w.WriteListItem(n)
+		case DescriptiveListItem:
+			w.WriteDescriptiveListItem(n)
+		case Table:
+			w.WriteTable(n)
+		case HorizontalRule:
+			w.WriteHorizontalRule(n)
+		case Paragraph:
+			w.WriteParagraph(n)
+		case Text:
+			w.WriteText(n)
+		case Emphasis:
+			w.WriteEmphasis(n)
+		case LatexFragment:
+			w.WriteLatexFragment(n)
+		case StatisticToken:
+			w.WriteStatisticToken(n)
+		case ExplicitLineBreak:
+			w.WriteExplicitLineBreak(n)
+		case LineBreak:
+			w.WriteLineBreak(n)
+		case RegularLink:
+			w.WriteRegularLink(n)
+		case Timestamp:
+			w.WriteTimestamp(n)
+		case FootnoteLink:
+			w.WriteFootnoteLink(n)
+		case FootnoteDefinition:
+			w.WriteFootnoteDefinition(n)
+		default:
+			if n != nil {
+				panic(fmt.Sprintf("bad node %T %#v", n, n))
+			}
+		}
+	}
+}