Add evert's davclient.js + es6-promise + IE8 workaround

- Add davclient.js lib
- Add es6-promise required by that lib
- Wrote IE8 workaround lib/shim for davclient.js

11 files changed, 1579 insertions, 2 deletions

diff --git a/core/js/core.json b/core/js/core.json
index a80636e8463..c7621a08d62 100644
--- a/core/js/core.json
+++ b/core/js/core.json
@@ -8,7 +8,9 @@
 		"handlebars/handlebars.js",
 		"blueimp-md5/js/md5.js",
 		"bootstrap/js/tooltip.js",
-		"backbone/backbone.js"
+		"backbone/backbone.js",
+		"es6-promise/dist/es6-promise.js",
+		"davclient.js/lib/client.js"
 	],
 	"libraries": [
 		"jquery-showpassword.js",
@@ -39,6 +41,8 @@
 		"setupchecks.js",
 		"../search/js/search.js",
 		"mimetype.js",
-		"mimetypelist.js"
+		"mimetypelist.js",
+		"files/fileinfo.js",
+		"files/client.js"
 	]
 }
diff --git a/core/js/files/ie8davclient.js b/core/js/files/ie8davclient.js
new file mode 100644
index 00000000000..9887d34e5b4
--- /dev/null
+++ b/core/js/files/ie8davclient.js
@@ -0,0 +1,169 @@
+/*
+ * Copyright (c) 2015
+ *
+ * This file is licensed under the Affero General Public License version 3
+ * or later.
+ *
+ * See the COPYING-README file.
+ *
+ */
+
+/* global dav */
+(function(dav) {
+
+	/**
+	 * Override davclient.js methods with IE8-compatible logic
+	 */
+	dav.Client.prototype = _.extend({}, dav.Client.prototype, {
+
+		/**
+		 * Generates a propFind request.
+		 *
+		 * @param {string} url Url to do the propfind request on
+		 * @param {Array} properties List of properties to retrieve.
+		 * @return {Promise}
+		 */
+		propFind : function(url, properties, depth) {
+
+			if(typeof depth == "undefined") {
+				depth = 0;
+			}
+
+			var headers = {
+				Depth          : depth,
+				'Content-Type' : 'application/xml; charset=utf-8'
+			};
+
+			var body =
+				'<?xml version="1.0"?>\n' +
+				'<d:propfind ';
+
+			var namespace;
+			for (namespace in this.xmlNamespaces) {
+				body += ' xmlns:' + this.xmlNamespaces[namespace] + '="' + namespace + '"';
+			}
+			body += '>\n' +
+				'  <d:prop>\n';
+
+			for(var ii in properties) {
+				var propText = properties[ii];
+				if (typeof propText !== 'string') {
+					// can happen on IE8
+					continue;
+				}
+				var property = this.parseClarkNotation(properties[ii]);
+				if (this.xmlNamespaces[property.namespace]) {
+					body+='    <' + this.xmlNamespaces[property.namespace] + ':' + property.name + ' />\n';
+				} else {
+					body+='    <x:' + property.name + ' xmlns:x="' + property.namespace + '" />\n';
+				}
+
+			}
+			body+='  </d:prop>\n';
+			body+='</d:propfind>';
+
+			return this.request('PROPFIND', url, headers, body).then(
+				function(result) {
+					var elements = this.parseMultiStatus(result.xhr.responseXML);
+					var response;
+					if (depth===0) {
+						response = {
+							status: result.status,
+							body: elements[0]
+						};
+					} else {
+						response = {
+							status: result.status,
+							body: elements
+						};
+					}
+					return response;
+
+				}.bind(this)
+			);
+
+		},
+
+
+		_getElementsByTagName: function(node, name, resolver) {
+			var parts = name.split(':');
+			var tagName = parts[1];
+			var namespace = resolver(parts[0]);
+			if (node.getElementsByTagNameNS) {
+				return node.getElementsByTagNameNS(namespace, tagName);
+			}
+			return node.getElementsByTagName(name);
+		},
+
+		/**
+		 * Parses a multi-status response body.
+		 *
+		 * @param {string} xmlBody
+		 * @param {Array}
+		 */
+		parseMultiStatus : function(doc) {
+
+			var result = [];
+			var resolver = function(foo) {
+				var ii;
+				for(ii in this.xmlNamespaces) {
+					if (this.xmlNamespaces[ii] === foo) {
+						return ii;
+					}
+				}
+			}.bind(this);
+
+			var responses = this._getElementsByTagName(doc, 'd:response', resolver);
+			var i;
+			for (i = 0; i < responses.length; i++) {
+				var responseNode = responses[i];
+				var response = {
+					href : null,
+					propStat : []
+				};
+
+				var hrefNode = this._getElementsByTagName(responseNode, 'd:href', resolver)[0];
+
+				response.href = hrefNode.textContent || hrefNode.text;
+
+				var propStatNodes = this._getElementsByTagName(responseNode, 'd:propstat', resolver);
+				var j = 0;
+
+				for (j = 0; j < propStatNodes.length; j++) {
+					var propStatNode = propStatNodes[j];
+					var statusNode = this._getElementsByTagName(propStatNode, 'd:status', resolver)[0];
+
+					var propStat = {
+						status : statusNode.textContent || statusNode.text,
+						properties : []
+					};
+
+					var propNode = this._getElementsByTagName(propStatNode, 'd:prop', resolver)[0];
+					if (!propNode) {
+						continue;
+					}
+					var k = 0;
+					for (k = 0; k < propNode.childNodes.length; k++) {
+						var prop = propNode.childNodes[k];
+						var value = prop.textContent || prop.text;
+						if (prop.childNodes && prop.childNodes.length > 0 && prop.childNodes[0].nodeType === 1) {
+							value = prop.childNodes;
+						}
+						propStat.properties['{' + prop.namespaceURI + '}' + (prop.localName || prop.baseName)] = value;
+
+					}
+					response.propStat.push(propStat);
+				}
+
+				result.push(response);
+			}
+
+			return result;
+
+		}
+
+
+	});
+
+})(dav);
+
diff --git a/core/vendor/.gitignore b/core/vendor/.gitignore
index bcbb59b6f24..09b6a47c72d 100644
--- a/core/vendor/.gitignore
+++ b/core/vendor/.gitignore
@@ -122,3 +122,14 @@ bootstrap/js/*
 
 # backbone
 backbone/backbone-min*
+
+# davclient.js
+davclient.js/**
+!davclient.js/lib/*
+!davclient.js/LICENSE
+
+# es6-promise
+es6-promise/**
+!es6-promise/LICENSE
+!es6-promise/dist/es6-promise.js
+
diff --git a/core/vendor/davclient.js/LICENSE b/core/vendor/davclient.js/LICENSE
new file mode 100644
index 00000000000..fd7293e8f32
--- /dev/null
+++ b/core/vendor/davclient.js/LICENSE
@@ -0,0 +1,27 @@
+Copyright (C) 2013-2014 fruux GmbH (https://fruux.com/)
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright notice,
+      this list of conditions and the following disclaimer in the documentation
+      and/or other materials provided with the distribution.
+    * Neither the name Sabre nor the names of its contributors
+      may be used to endorse or promote products derived from this software
+      without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+    ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+    POSSIBILITY OF SUCH DAMAGE.
diff --git a/core/vendor/davclient.js/lib/client.js b/core/vendor/davclient.js/lib/client.js
new file mode 100644
index 00000000000..93678f09248
--- /dev/null
+++ b/core/vendor/davclient.js/lib/client.js
@@ -0,0 +1,296 @@
+if (typeof dav == 'undefined') { dav = {}; };
+
+dav.Client = function(options) {
+    var i;
+    for(i in options) {
+        this[i] = options[i];
+    }
+
+};
+
+dav.Client.prototype = {
+
+    baseUrl : null,
+
+    userName : null,
+
+    password : null,
+
+
+    xmlNamespaces : {
+        'DAV:' : 'd'
+    },
+
+    /**
+     * Generates a propFind request.
+     *
+     * @param {string} url Url to do the propfind request on
+     * @param {Array} properties List of properties to retrieve.
+     * @return {Promise}
+     */
+    propFind : function(url, properties, depth) {
+
+        if(typeof depth == "undefined") {
+            depth = 0;
+        }
+
+        var headers = {
+            Depth          : depth,
+            'Content-Type' : 'application/xml; charset=utf-8'
+        };
+
+        var body =
+            '<?xml version="1.0"?>\n' +
+            '<d:propfind ';
+        var namespace;
+        for (namespace in this.xmlNamespaces) {
+            body += ' xmlns:' + this.xmlNamespaces[namespace] + '="' + namespace + '"';
+        }
+        body += '>\n' +
+            '  <d:prop>\n';
+
+        for(var ii in properties) {
+
+            var property = this.parseClarkNotation(properties[ii]);
+            if (this.xmlNamespaces[property.namespace]) {
+                body+='    <' + this.xmlNamespaces[property.namespace] + ':' + property.name + ' />\n';
+            } else {
+                body+='    <x:' + property.name + ' xmlns:x="' + property.namespace + '" />\n';
+            }
+
+        }
+        body+='  </d:prop>\n';
+        body+='</d:propfind>';
+
+        return this.request('PROPFIND', url, headers, body).then(
+            function(result) {
+
+                var resultBody = this.parseMultiStatus(result.body);
+                if (depth===0) {
+                    return {
+                        status: result.status,
+                        body: resultBody[0],
+                        xhr: result.xhr
+                    };
+                } else {
+                    return {
+                        status: result.status,
+                        body: resultBody,
+                        xhr: result.xhr
+                    };
+                }
+
+            }.bind(this)
+        );
+
+    },
+
+    /**
+     * Performs a HTTP request, and returns a Promise
+     *
+     * @param {string} method HTTP method
+     * @param {string} url Relative or absolute url
+     * @param {Object} headers HTTP headers as an object.
+     * @param {string} body HTTP request body.
+     * @return {Promise}
+     */
+    request : function(method, url, headers, body) {
+
+        var xhr = this.xhrProvider();
+
+        if (this.userName) {
+            headers['Authorization'] = 'Basic ' + btoa(this.userName + ':' + this.password);
+            // xhr.open(method, this.resolveUrl(url), true, this.userName, this.password);
+        }
+        xhr.open(method, this.resolveUrl(url), true);
+        var ii;
+        for(ii in headers) {
+            xhr.setRequestHeader(ii, headers[ii]);
+        }
+        xhr.send(body);
+
+        return new Promise(function(fulfill, reject) {
+
+            xhr.onreadystatechange = function() {
+
+                if (xhr.readyState !== 4) {
+                    return;
+                }
+
+                fulfill({
+                    body: xhr.response,
+                    status: xhr.status,
+                    xhr: xhr
+                });
+
+            };
+
+            xhr.ontimeout = function() {
+
+                reject(new Error('Timeout exceeded'));
+
+            };
+
+        });
+
+    },
+
+    /**
+     * Returns an XMLHttpRequest object.
+     *
+     * This is in its own method, so it can be easily overridden.
+     *
+     * @return {XMLHttpRequest}
+     */
+    xhrProvider : function() {
+
+        return new XMLHttpRequest();
+
+    },
+
+
+    /**
+     * Parses a multi-status response body.
+     *
+     * @param {string} xmlBody
+     * @param {Array}
+     */
+    parseMultiStatus : function(xmlBody) {
+
+        var parser = new DOMParser();
+        var doc = parser.parseFromString(xmlBody, "application/xml");
+
+        var resolver = function(foo) {
+            var ii;
+            for(ii in this.xmlNamespaces) {
+                if (this.xmlNamespaces[ii] === foo) {
+                    return ii;
+                }
+            }
+        }.bind(this);
+
+        var responseIterator = doc.evaluate('/d:multistatus/d:response', doc, resolver);
+
+        var result = [];
+        var responseNode = responseIterator.iterateNext();
+
+        while(responseNode) {
+
+            var response = {
+                href : null,
+                propStat : []
+            };
+
+            response.href = doc.evaluate('string(d:href)', responseNode, resolver).stringValue;
+
+            var propStatIterator = doc.evaluate('d:propstat', responseNode, resolver);
+            var propStatNode = propStatIterator.iterateNext();
+
+            while(propStatNode) {
+
+                var propStat = {
+                    status : doc.evaluate('string(d:status)', propStatNode, resolver).stringValue,
+                    properties : [],
+                };
+
+                var propIterator = doc.evaluate('d:prop/*', propStatNode, resolver);
+
+                var propNode = propIterator.iterateNext();
+                while(propNode) {
+                    var content = propNode.textContent;
+                    if (!content && propNode.hasChildNodes()) {
+                        content = propNode.childNodes;
+                    }
+
+                    propStat.properties['{' + propNode.namespaceURI + '}' + propNode.localName] = content;
+                    propNode = propIterator.iterateNext();
+
+                }
+                response.propStat.push(propStat);
+                propStatNode = propStatIterator.iterateNext();
+
+
+            }
+
+            result.push(response);
+            responseNode = responseIterator.iterateNext();
+
+        }
+
+        return result;
+
+    },
+
+    /**
+     * Takes a relative url, and maps it to an absolute url, using the baseUrl
+     *
+     * @param {string} url
+     * @return {string}
+     */
+    resolveUrl : function(url) {
+
+        // Note: this is rudamentary.. not sure yet if it handles every case.
+        if (/^https?:\/\//i.test(url)) {
+            // absolute
+            return url;
+        }
+
+        var baseParts = this.parseUrl(this.baseUrl);
+        if (url.charAt('/')) {
+            // Url starts with a slash
+            return baseParts.root + url;
+        }
+
+        // Url does not start with a slash, we need grab the base url right up until the last slash.
+        var newUrl = baseParts.root + '/';
+        if (baseParts.path.lastIndexOf('/')!==-1) {
+            newUrl = newUrl = baseParts.path.subString(0, baseParts.path.lastIndexOf('/')) + '/';
+        }
+        newUrl+=url;
+        return url;
+
+    },
+
+    /**
+     * Parses a url and returns its individual components.
+     *
+     * @param {String} url
+     * @return {Object}
+     */
+    parseUrl : function(url) {
+
+         var parts = url.match(/^(?:([A-Za-z]+):)?(\/{0,3})([0-9.\-A-Za-z]+)(?::(\d+))?(?:\/([^?#]*))?(?:\?([^#]*))?(?:#(.*))?$/);
+         var result = {
+             url : parts[0],
+             scheme : parts[1],
+             host : parts[3],
+             port : parts[4],
+             path : parts[5],
+             query : parts[6],
+             fragment : parts[7],
+         };
+         result.root =
+            result.scheme + '://' +
+            result.host +
+            (result.port ? ':' + result.port : '');
+
+         return result;
+
+    },
+
+    parseClarkNotation : function(propertyName) {
+
+        var result = propertyName.match(/^{([^}]+)}(.*)$/);
+        if (!result) {
+            return;
+        }
+
+        return {
+            name : result[2],
+            namespace : result[1]
+        };
+
+    }
+
+};
+
diff --git a/core/vendor/es6-promise/.bower.json b/core/vendor/es6-promise/.bower.json
new file mode 100644
index 00000000000..f8c28b04e53
--- /dev/null
+++ b/core/vendor/es6-promise/.bower.json
@@ -0,0 +1,40 @@
+{
+  "name": "es6-promise",
+  "namespace": "Promise",
+  "version": "2.3.0",
+  "description": "A polyfill for ES6-style Promises, tracking rsvp",
+  "authors": [
+    "Stefan Penner <stefan.penner@gmail.com>"
+  ],
+  "main": "dist/es6-promise.js",
+  "keywords": [
+    "promise"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/jakearchibald/ES6-Promises.git"
+  },
+  "bugs": {
+    "url": "https://github.com/jakearchibald/ES6-Promises/issues"
+  },
+  "license": "MIT",
+  "ignore": [
+    "node_modules",
+    "bower_components",
+    "test",
+    "tests",
+    "vendor",
+    "tasks"
+  ],
+  "homepage": "https://github.com/jakearchibald/es6-promise",
+  "_release": "2.3.0",
+  "_resolution": {
+    "type": "version",
+    "tag": "2.3.0",
+    "commit": "fcbab11a1a981eb2290bfff89017cb764335a2a5"
+  },
+  "_source": "https://github.com/jakearchibald/es6-promise.git",
+  "_target": "~2.3.0",
+  "_originalSource": "https://github.com/jakearchibald/es6-promise.git",
+  "_direct": true
+}
\ No newline at end of file
diff --git a/core/vendor/es6-promise/.npmignore b/core/vendor/es6-promise/.npmignore
new file mode 100644
index 00000000000..7a758111e9e
--- /dev/null
+++ b/core/vendor/es6-promise/.npmignore
@@ -0,0 +1,11 @@
+/node_modules/
+/tmp
+/tasks
+/test
+/vendor
+/.jshintrc
+/.npmignore
+/.travis.yml
+/Gruntfile.js
+/component.json
+/index.html
diff --git a/core/vendor/es6-promise/.release.json b/core/vendor/es6-promise/.release.json
new file mode 100644
index 00000000000..dee8cbc5d92
--- /dev/null
+++ b/core/vendor/es6-promise/.release.json
@@ -0,0 +1,17 @@
+{
+  "non-interactive": true,
+  "dry-run": false,
+  "verbose": false,
+  "force": false,
+  "pkgFiles": ["package.json", "bower.json"],
+  "increment": "patch",
+  "commitMessage": "Release %s",
+  "tagName": "%s",
+  "tagAnnotation": "Release %s",
+  "buildCommand": "npm run-script build-all",
+  "distRepo": "git@github.com:components/rsvp.js.git",
+  "distStageDir": "tmp/stage",
+  "distBase": "dist",
+  "distFiles": ["**/*", "../package.json", "../bower.json"],
+  "publish": false
+}
diff --git a/core/vendor/es6-promise/.spmignore b/core/vendor/es6-promise/.spmignore
new file mode 100644
index 00000000000..7a758111e9e
--- /dev/null
+++ b/core/vendor/es6-promise/.spmignore
@@ -0,0 +1,11 @@
+/node_modules/
+/tmp
+/tasks
+/test
+/vendor
+/.jshintrc
+/.npmignore
+/.travis.yml
+/Gruntfile.js
+/component.json
+/index.html
diff --git a/core/vendor/es6-promise/LICENSE b/core/vendor/es6-promise/LICENSE
new file mode 100644
index 00000000000..954ec5992df
--- /dev/null
+++ b/core/vendor/es6-promise/LICENSE
@@ -0,0 +1,19 @@
+Copyright (c) 2014 Yehuda Katz, Tom Dale, Stefan Penner and contributors
+
+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/core/vendor/es6-promise/dist/es6-promise.js b/core/vendor/es6-promise/dist/es6-promise.js
new file mode 100644
index 00000000000..aff0482ee5e
--- /dev/null
+++ b/core/vendor/es6-promise/dist/es6-promise.js
@@ -0,0 +1,972 @@
+/*!
+ * @overview es6-promise - a tiny implementation of Promises/A+.
+ * @copyright Copyright (c) 2014 Yehuda Katz, Tom Dale, Stefan Penner and contributors (Conversion to ES6 API by Jake Archibald)
+ * @license   Licensed under MIT license
+ *            See https://raw.githubusercontent.com/jakearchibald/es6-promise/master/LICENSE
+ * @version   2.3.0
+ */
+
+(function() {
+    "use strict";
+    function lib$es6$promise$utils$$objectOrFunction(x) {
+      return typeof x === 'function' || (typeof x === 'object' && x !== null);
+    }
+
+    function lib$es6$promise$utils$$isFunction(x) {
+      return typeof x === 'function';
+    }
+
+    function lib$es6$promise$utils$$isMaybeThenable(x) {
+      return typeof x === 'object' && x !== null;
+    }
+
+    var lib$es6$promise$utils$$_isArray;
+    if (!Array.isArray) {
+      lib$es6$promise$utils$$_isArray = function (x) {
+        return Object.prototype.toString.call(x) === '[object Array]';
+      };
+    } else {
+      lib$es6$promise$utils$$_isArray = Array.isArray;
+    }
+
+    var lib$es6$promise$utils$$isArray = lib$es6$promise$utils$$_isArray;
+    var lib$es6$promise$asap$$len = 0;
+    var lib$es6$promise$asap$$toString = {}.toString;
+    var lib$es6$promise$asap$$vertxNext;
+    var lib$es6$promise$asap$$customSchedulerFn;
+
+    var lib$es6$promise$asap$$asap = function asap(callback, arg) {
+      lib$es6$promise$asap$$queue[lib$es6$promise$asap$$len] = callback;
+      lib$es6$promise$asap$$queue[lib$es6$promise$asap$$len + 1] = arg;
+      lib$es6$promise$asap$$len += 2;
+      if (lib$es6$promise$asap$$len === 2) {
+        // If len is 2, that means that we need to schedule an async flush.
+        // If additional callbacks are queued before the queue is flushed, they
+        // will be processed by this flush that we are scheduling.
+        if (lib$es6$promise$asap$$customSchedulerFn) {
+          lib$es6$promise$asap$$customSchedulerFn(lib$es6$promise$asap$$flush);
+        } else {
+          lib$es6$promise$asap$$scheduleFlush();
+        }
+      }
+    }
+
+    function lib$es6$promise$asap$$setScheduler(scheduleFn) {
+      lib$es6$promise$asap$$customSchedulerFn = scheduleFn;
+    }
+
+    function lib$es6$promise$asap$$setAsap(asapFn) {
+      lib$es6$promise$asap$$asap = asapFn;
+    }
+
+    var lib$es6$promise$asap$$browserWindow = (typeof window !== 'undefined') ? window : undefined;
+    var lib$es6$promise$asap$$browserGlobal = lib$es6$promise$asap$$browserWindow || {};
+    var lib$es6$promise$asap$$BrowserMutationObserver = lib$es6$promise$asap$$browserGlobal.MutationObserver || lib$es6$promise$asap$$browserGlobal.WebKitMutationObserver;
+    var lib$es6$promise$asap$$isNode = typeof process !== 'undefined' && {}.toString.call(process) === '[object process]';
+
+    // test for web worker but not in IE10
+    var lib$es6$promise$asap$$isWorker = typeof Uint8ClampedArray !== 'undefined' &&
+      typeof importScripts !== 'undefined' &&
+      typeof MessageChannel !== 'undefined';
+
+    // node
+    function lib$es6$promise$asap$$useNextTick() {
+      var nextTick = process.nextTick;
+      // node version 0.10.x displays a deprecation warning when nextTick is used recursively
+      // setImmediate should be used instead instead
+      var version = process.versions.node.match(/^(?:(\d+)\.)?(?:(\d+)\.)?(\*|\d+)$/);
+      if (Array.isArray(version) && version[1] === '0' && version[2] === '10') {
+        nextTick = setImmediate;
+      }
+      return function() {
+        nextTick(lib$es6$promise$asap$$flush);
+      };
+    }
+
+    // vertx
+    function lib$es6$promise$asap$$useVertxTimer() {
+      return function() {
+        lib$es6$promise$asap$$vertxNext(lib$es6$promise$asap$$flush);
+      };
+    }
+
+    function lib$es6$promise$asap$$useMutationObserver() {
+      var iterations = 0;
+      var observer = new lib$es6$promise$asap$$BrowserMutationObserver(lib$es6$promise$asap$$flush);
+      var node = document.createTextNode('');
+      observer.observe(node, { characterData: true });
+
+      return function() {
+        node.data = (iterations = ++iterations % 2);
+      };
+    }
+
+    // web worker
+    function lib$es6$promise$asap$$useMessageChannel() {
+      var channel = new MessageChannel();
+      channel.port1.onmessage = lib$es6$promise$asap$$flush;
+      return function () {
+        channel.port2.postMessage(0);
+      };
+    }
+
+    function lib$es6$promise$asap$$useSetTimeout() {
+      return function() {
+        setTimeout(lib$es6$promise$asap$$flush, 1);
+      };
+    }
+
+    var lib$es6$promise$asap$$queue = new Array(1000);
+    function lib$es6$promise$asap$$flush() {
+      for (var i = 0; i < lib$es6$promise$asap$$len; i+=2) {
+        var callback = lib$es6$promise$asap$$queue[i];
+        var arg = lib$es6$promise$asap$$queue[i+1];
+
+        callback(arg);
+
+        lib$es6$promise$asap$$queue[i] = undefined;
+        lib$es6$promise$asap$$queue[i+1] = undefined;
+      }
+
+      lib$es6$promise$asap$$len = 0;
+    }
+
+    function lib$es6$promise$asap$$attemptVertex() {
+      try {
+        var r = require;
+        var vertx = r('vertx');
+        lib$es6$promise$asap$$vertxNext = vertx.runOnLoop || vertx.runOnContext;
+        return lib$es6$promise$asap$$useVertxTimer();
+      } catch(e) {
+        return lib$es6$promise$asap$$useSetTimeout();
+      }
+    }
+
+    var lib$es6$promise$asap$$scheduleFlush;
+    // Decide what async method to use to triggering processing of queued callbacks:
+    if (lib$es6$promise$asap$$isNode) {
+      lib$es6$promise$asap$$scheduleFlush = lib$es6$promise$asap$$useNextTick();
+    } else if (lib$es6$promise$asap$$BrowserMutationObserver) {
+      lib$es6$promise$asap$$scheduleFlush = lib$es6$promise$asap$$useMutationObserver();
+    } else if (lib$es6$promise$asap$$isWorker) {
+      lib$es6$promise$asap$$scheduleFlush = lib$es6$promise$asap$$useMessageChannel();
+    } else if (lib$es6$promise$asap$$browserWindow === undefined && typeof require === 'function') {
+      lib$es6$promise$asap$$scheduleFlush = lib$es6$promise$asap$$attemptVertex();
+    } else {
+      lib$es6$promise$asap$$scheduleFlush = lib$es6$promise$asap$$useSetTimeout();
+    }
+
+    function lib$es6$promise$$internal$$noop() {}
+
+    var lib$es6$promise$$internal$$PENDING   = void 0;
+    var lib$es6$promise$$internal$$FULFILLED = 1;
+    var lib$es6$promise$$internal$$REJECTED  = 2;
+
+    var lib$es6$promise$$internal$$GET_THEN_ERROR = new lib$es6$promise$$internal$$ErrorObject();
+
+    function lib$es6$promise$$internal$$selfFullfillment() {
+      return new TypeError("You cannot resolve a promise with itself");
+    }
+
+    function lib$es6$promise$$internal$$cannotReturnOwn() {
+      return new TypeError('A promises callback cannot return that same promise.');
+    }
+
+    function lib$es6$promise$$internal$$getThen(promise) {
+      try {
+        return promise.then;
+      } catch(error) {
+        lib$es6$promise$$internal$$GET_THEN_ERROR.error = error;
+        return lib$es6$promise$$internal$$GET_THEN_ERROR;
+      }
+    }
+
+    function lib$es6$promise$$internal$$tryThen(then, value, fulfillmentHandler, rejectionHandler) {
+      try {
+        then.call(value, fulfillmentHandler, rejectionHandler);
+      } catch(e) {
+        return e;
+      }
+    }
+
+    function lib$es6$promise$$internal$$handleForeignThenable(promise, thenable, then) {
+       lib$es6$promise$asap$$asap(function(promise) {
+        var sealed = false;
+        var error = lib$es6$promise$$internal$$tryThen(then, thenable, function(value) {
+          if (sealed) { return; }
+          sealed = true;
+          if (thenable !== value) {
+            lib$es6$promise$$internal$$resolve(promise, value);
+          } else {
+            lib$es6$promise$$internal$$fulfill(promise, value);
+          }
+        }, function(reason) {
+          if (sealed) { return; }
+          sealed = true;
+
+          lib$es6$promise$$internal$$reject(promise, reason);
+        }, 'Settle: ' + (promise._label || ' unknown promise'));
+
+        if (!sealed && error) {
+          sealed = true;
+          lib$es6$promise$$internal$$reject(promise, error);
+        }
+      }, promise);
+    }
+
+    function lib$es6$promise$$internal$$handleOwnThenable(promise, thenable) {
+      if (thenable._state === lib$es6$promise$$internal$$FULFILLED) {
+        lib$es6$promise$$internal$$fulfill(promise, thenable._result);
+      } else if (thenable._state === lib$es6$promise$$internal$$REJECTED) {
+        lib$es6$promise$$internal$$reject(promise, thenable._result);
+      } else {
+        lib$es6$promise$$internal$$subscribe(thenable, undefined, function(value) {
+          lib$es6$promise$$internal$$resolve(promise, value);
+        }, function(reason) {
+          lib$es6$promise$$internal$$reject(promise, reason);
+        });
+      }
+    }
+
+    function lib$es6$promise$$internal$$handleMaybeThenable(promise, maybeThenable) {
+      if (maybeThenable.constructor === promise.constructor) {
+        lib$es6$promise$$internal$$handleOwnThenable(promise, maybeThenable);
+      } else {
+        var then = lib$es6$promise$$internal$$getThen(maybeThenable);
+
+        if (then === lib$es6$promise$$internal$$GET_THEN_ERROR) {
+          lib$es6$promise$$internal$$reject(promise, lib$es6$promise$$internal$$GET_THEN_ERROR.error);
+        } else if (then === undefined) {
+          lib$es6$promise$$internal$$fulfill(promise, maybeThenable);
+        } else if (lib$es6$promise$utils$$isFunction(then)) {
+          lib$es6$promise$$internal$$handleForeignThenable(promise, maybeThenable, then);
+        } else {
+          lib$es6$promise$$internal$$fulfill(promise, maybeThenable);
+        }
+      }
+    }
+
+    function lib$es6$promise$$internal$$resolve(promise, value) {
+      if (promise === value) {
+        lib$es6$promise$$internal$$reject(promise, lib$es6$promise$$internal$$selfFullfillment());
+      } else if (lib$es6$promise$utils$$objectOrFunction(value)) {
+        lib$es6$promise$$internal$$handleMaybeThenable(promise, value);
+      } else {
+        lib$es6$promise$$internal$$fulfill(promise, value);
+      }
+    }
+
+    function lib$es6$promise$$internal$$publishRejection(promise) {
+      if (promise._onerror) {
+        promise._onerror(promise._result);
+      }
+
+      lib$es6$promise$$internal$$publish(promise);
+    }
+
+    function lib$es6$promise$$internal$$fulfill(promise, value) {
+      if (promise._state !== lib$es6$promise$$internal$$PENDING) { return; }
+
+      promise._result = value;
+      promise._state = lib$es6$promise$$internal$$FULFILLED;
+
+      if (promise._subscribers.length !== 0) {
+        lib$es6$promise$asap$$asap(lib$es6$promise$$internal$$publish, promise);
+      }
+    }
+
+    function lib$es6$promise$$internal$$reject(promise, reason) {
+      if (promise._state !== lib$es6$promise$$internal$$PENDING) { return; }
+      promise._state = lib$es6$promise$$internal$$REJECTED;
+      promise._result = reason;
+
+      lib$es6$promise$asap$$asap(lib$es6$promise$$internal$$publishRejection, promise);
+    }
+
+    function lib$es6$promise$$internal$$subscribe(parent, child, onFulfillment, onRejection) {
+      var subscribers = parent._subscribers;
+      var length = subscribers.length;
+
+      parent._onerror = null;
+
+      subscribers[length] = child;
+      subscribers[length + lib$es6$promise$$internal$$FULFILLED] = onFulfillment;
+      subscribers[length + lib$es6$promise$$internal$$REJECTED]  = onRejection;
+
+      if (length === 0 && parent._state) {
+        lib$es6$promise$asap$$asap(lib$es6$promise$$internal$$publish, parent);
+      }
+    }
+
+    function lib$es6$promise$$internal$$publish(promise) {
+      var subscribers = promise._subscribers;
+      var settled = promise._state;
+
+      if (subscribers.length === 0) { return; }
+
+      var child, callback, detail = promise._result;
+
+      for (var i = 0; i < subscribers.length; i += 3) {
+        child = subscribers[i];
+        callback = subscribers[i + settled];
+
+        if (child) {
+          lib$es6$promise$$internal$$invokeCallback(settled, child, callback, detail);
+        } else {
+          callback(detail);
+        }
+      }
+
+      promise._subscribers.length = 0;
+    }
+
+    function lib$es6$promise$$internal$$ErrorObject() {
+      this.error = null;
+    }
+
+    var lib$es6$promise$$internal$$TRY_CATCH_ERROR = new lib$es6$promise$$internal$$ErrorObject();
+
+    function lib$es6$promise$$internal$$tryCatch(callback, detail) {
+      try {
+        return callback(detail);
+      } catch(e) {
+        lib$es6$promise$$internal$$TRY_CATCH_ERROR.error = e;
+        return lib$es6$promise$$internal$$TRY_CATCH_ERROR;
+      }
+    }
+
+    function lib$es6$promise$$internal$$invokeCallback(settled, promise, callback, detail) {
+      var hasCallback = lib$es6$promise$utils$$isFunction(callback),
+          value, error, succeeded, failed;
+
+      if (hasCallback) {
+        value = lib$es6$promise$$internal$$tryCatch(callback, detail);
+
+        if (value === lib$es6$promise$$internal$$TRY_CATCH_ERROR) {
+          failed = true;
+          error = value.error;
+          value = null;
+        } else {
+          succeeded = true;
+        }
+
+        if (promise === value) {
+          lib$es6$promise$$internal$$reject(promise, lib$es6$promise$$internal$$cannotReturnOwn());
+          return;
+        }
+
+      } else {
+        value = detail;
+        succeeded = true;
+      }
+
+      if (promise._state !== lib$es6$promise$$internal$$PENDING) {
+        // noop
+      } else if (hasCallback && succeeded) {
+        lib$es6$promise$$internal$$resolve(promise, value);
+      } else if (failed) {
+        lib$es6$promise$$internal$$reject(promise, error);
+      } else if (settled === lib$es6$promise$$internal$$FULFILLED) {
+        lib$es6$promise$$internal$$fulfill(promise, value);
+      } else if (settled === lib$es6$promise$$internal$$REJECTED) {
+        lib$es6$promise$$internal$$reject(promise, value);
+      }
+    }
+
+    function lib$es6$promise$$internal$$initializePromise(promise, resolver) {
+      try {
+        resolver(function resolvePromise(value){
+          lib$es6$promise$$internal$$resolve(promise, value);
+        }, function rejectPromise(reason) {
+          lib$es6$promise$$internal$$reject(promise, reason);
+        });
+      } catch(e) {
+        lib$es6$promise$$internal$$reject(promise, e);
+      }
+    }
+
+    function lib$es6$promise$enumerator$$Enumerator(Constructor, input) {
+      var enumerator = this;
+
+      enumerator._instanceConstructor = Constructor;
+      enumerator.promise = new Constructor(lib$es6$promise$$internal$$noop);
+
+      if (enumerator._validateInput(input)) {
+        enumerator._input     = input;
+        enumerator.length     = input.length;
+        enumerator._remaining = input.length;
+
+        enumerator._init();
+
+        if (enumerator.length === 0) {
+          lib$es6$promise$$internal$$fulfill(enumerator.promise, enumerator._result);
+        } else {
+          enumerator.length = enumerator.length || 0;
+          enumerator._enumerate();
+          if (enumerator._remaining === 0) {
+            lib$es6$promise$$internal$$fulfill(enumerator.promise, enumerator._result);
+          }
+        }
+      } else {
+        lib$es6$promise$$internal$$reject(enumerator.promise, enumerator._validationError());
+      }
+    }
+
+    lib$es6$promise$enumerator$$Enumerator.prototype._validateInput = function(input) {
+      return lib$es6$promise$utils$$isArray(input);
+    };
+
+    lib$es6$promise$enumerator$$Enumerator.prototype._validationError = function() {
+      return new Error('Array Methods must be provided an Array');
+    };
+
+    lib$es6$promise$enumerator$$Enumerator.prototype._init = function() {
+      this._result = new Array(this.length);
+    };
+
+    var lib$es6$promise$enumerator$$default = lib$es6$promise$enumerator$$Enumerator;
+
+    lib$es6$promise$enumerator$$Enumerator.prototype._enumerate = function() {
+      var enumerator = this;
+
+      var length  = enumerator.length;
+      var promise = enumerator.promise;
+      var input   = enumerator._input;
+
+      for (var i = 0; promise._state === lib$es6$promise$$internal$$PENDING && i < length; i++) {
+        enumerator._eachEntry(input[i], i);
+      }
+    };
+
+    lib$es6$promise$enumerator$$Enumerator.prototype._eachEntry = function(entry, i) {
+      var enumerator = this;
+      var c = enumerator._instanceConstructor;
+
+      if (lib$es6$promise$utils$$isMaybeThenable(entry)) {
+        if (entry.constructor === c && entry._state !== lib$es6$promise$$internal$$PENDING) {
+          entry._onerror = null;
+          enumerator._settledAt(entry._state, i, entry._result);
+        } else {
+          enumerator._willSettleAt(c.resolve(entry), i);
+        }
+      } else {
+        enumerator._remaining--;
+        enumerator._result[i] = entry;
+      }
+    };
+
+    lib$es6$promise$enumerator$$Enumerator.prototype._settledAt = function(state, i, value) {
+      var enumerator = this;
+      var promise = enumerator.promise;
+
+      if (promise._state === lib$es6$promise$$internal$$PENDING) {
+        enumerator._remaining--;
+
+        if (state === lib$es6$promise$$internal$$REJECTED) {
+          lib$es6$promise$$internal$$reject(promise, value);
+        } else {
+          enumerator._result[i] = value;
+        }
+      }
+
+      if (enumerator._remaining === 0) {
+        lib$es6$promise$$internal$$fulfill(promise, enumerator._result);
+      }
+    };
+
+    lib$es6$promise$enumerator$$Enumerator.prototype._willSettleAt = function(promise, i) {
+      var enumerator = this;
+
+      lib$es6$promise$$internal$$subscribe(promise, undefined, function(value) {
+        enumerator._settledAt(lib$es6$promise$$internal$$FULFILLED, i, value);
+      }, function(reason) {
+        enumerator._settledAt(lib$es6$promise$$internal$$REJECTED, i, reason);
+      });
+    };
+    function lib$es6$promise$promise$all$$all(entries) {
+      return new lib$es6$promise$enumerator$$default(this, entries).promise;
+    }
+    var lib$es6$promise$promise$all$$default = lib$es6$promise$promise$all$$all;
+    function lib$es6$promise$promise$race$$race(entries) {
+      /*jshint validthis:true */
+      var Constructor = this;
+
+      var promise = new Constructor(lib$es6$promise$$internal$$noop);
+
+      if (!lib$es6$promise$utils$$isArray(entries)) {
+        lib$es6$promise$$internal$$reject(promise, new TypeError('You must pass an array to race.'));
+        return promise;
+      }
+
+      var length = entries.length;
+
+      function onFulfillment(value) {
+        lib$es6$promise$$internal$$resolve(promise, value);
+      }
+
+      function onRejection(reason) {
+        lib$es6$promise$$internal$$reject(promise, reason);
+      }
+
+      for (var i = 0; promise._state === lib$es6$promise$$internal$$PENDING && i < length; i++) {
+        lib$es6$promise$$internal$$subscribe(Constructor.resolve(entries[i]), undefined, onFulfillment, onRejection);
+      }
+
+      return promise;
+    }
+    var lib$es6$promise$promise$race$$default = lib$es6$promise$promise$race$$race;
+    function lib$es6$promise$promise$resolve$$resolve(object) {
+      /*jshint validthis:true */
+      var Constructor = this;
+
+      if (object && typeof object === 'object' && object.constructor === Constructor) {
+        return object;
+      }
+
+      var promise = new Constructor(lib$es6$promise$$internal$$noop);
+      lib$es6$promise$$internal$$resolve(promise, object);
+      return promise;
+    }
+    var lib$es6$promise$promise$resolve$$default = lib$es6$promise$promise$resolve$$resolve;
+    function lib$es6$promise$promise$reject$$reject(reason) {
+      /*jshint validthis:true */
+      var Constructor = this;
+      var promise = new Constructor(lib$es6$promise$$internal$$noop);
+      lib$es6$promise$$internal$$reject(promise, reason);
+      return promise;
+    }
+    var lib$es6$promise$promise$reject$$default = lib$es6$promise$promise$reject$$reject;
+
+    var lib$es6$promise$promise$$counter = 0;
+
+    function lib$es6$promise$promise$$needsResolver() {
+      throw new TypeError('You must pass a resolver function as the first argument to the promise constructor');
+    }
+
+    function lib$es6$promise$promise$$needsNew() {
+      throw new TypeError("Failed to construct 'Promise': Please use the 'new' operator, this object constructor cannot be called as a function.");
+    }
+
+    var lib$es6$promise$promise$$default = lib$es6$promise$promise$$Promise;
+    /**
+      Promise objects represent the eventual result of an asynchronous operation. The
+      primary way of interacting with a promise is through its `then` method, which
+      registers callbacks to receive either a promise's eventual value or the reason
+      why the promise cannot be fulfilled.
+
+      Terminology
+      -----------
+
+      - `promise` is an object or function with a `then` method whose behavior conforms to this specification.
+      - `thenable` is an object or function that defines a `then` method.
+      - `value` is any legal JavaScript value (including undefined, a thenable, or a promise).
+      - `exception` is a value that is thrown using the throw statement.
+      - `reason` is a value that indicates why a promise was rejected.
+      - `settled` the final resting state of a promise, fulfilled or rejected.
+
+      A promise can be in one of three states: pending, fulfilled, or rejected.
+
+      Promises that are fulfilled have a fulfillment value and are in the fulfilled
+      state.  Promises that are rejected have a rejection reason and are in the
+      rejected state.  A fulfillment value is never a thenable.
+
+      Promises can also be said to *resolve* a value.  If this value is also a
+      promise, then the original promise's settled state will match the value's
+      settled state.  So a promise that *resolves* a promise that rejects will
+      itself reject, and a promise that *resolves* a promise that fulfills will
+      itself fulfill.
+
+
+      Basic Usage:
+      ------------
+
+      ```js
+      var promise = new Promise(function(resolve, reject) {
+        // on success
+        resolve(value);
+
+        // on failure
+        reject(reason);
+      });
+
+      promise.then(function(value) {
+        // on fulfillment
+      }, function(reason) {
+        // on rejection
+      });
+      ```
+
+      Advanced Usage:
+      ---------------
+
+      Promises shine when abstracting away asynchronous interactions such as
+      `XMLHttpRequest`s.
+
+      ```js
+      function getJSON(url) {
+        return new Promise(function(resolve, reject){
+          var xhr = new XMLHttpRequest();
+
+          xhr.open('GET', url);
+          xhr.onreadystatechange = handler;
+          xhr.responseType = 'json';
+          xhr.setRequestHeader('Accept', 'application/json');
+          xhr.send();
+
+          function handler() {
+            if (this.readyState === this.DONE) {
+              if (this.status === 200) {
+                resolve(this.response);
+              } else {
+                reject(new Error('getJSON: `' + url + '` failed with status: [' + this.status + ']'));
+              }
+            }
+          };
+        });
+      }
+
+      getJSON('/posts.json').then(function(json) {
+        // on fulfillment
+      }, function(reason) {
+        // on rejection
+      });
+      ```
+
+      Unlike callbacks, promises are great composable primitives.
+
+      ```js
+      Promise.all([
+        getJSON('/posts'),
+        getJSON('/comments')
+      ]).then(function(values){
+        values[0] // => postsJSON
+        values[1] // => commentsJSON
+
+        return values;
+      });
+      ```
+
+      @class Promise
+      @param {function} resolver
+      Useful for tooling.
+      @constructor
+    */
+    function lib$es6$promise$promise$$Promise(resolver) {
+      this._id = lib$es6$promise$promise$$counter++;
+      this._state = undefined;
+      this._result = undefined;
+      this._subscribers = [];
+
+      if (lib$es6$promise$$internal$$noop !== resolver) {
+        if (!lib$es6$promise$utils$$isFunction(resolver)) {
+          lib$es6$promise$promise$$needsResolver();
+        }
+
+        if (!(this instanceof lib$es6$promise$promise$$Promise)) {
+          lib$es6$promise$promise$$needsNew();
+        }
+
+        lib$es6$promise$$internal$$initializePromise(this, resolver);
+      }
+    }
+
+    lib$es6$promise$promise$$Promise.all = lib$es6$promise$promise$all$$default;
+    lib$es6$promise$promise$$Promise.race = lib$es6$promise$promise$race$$default;
+    lib$es6$promise$promise$$Promise.resolve = lib$es6$promise$promise$resolve$$default;
+    lib$es6$promise$promise$$Promise.reject = lib$es6$promise$promise$reject$$default;
+    lib$es6$promise$promise$$Promise._setScheduler = lib$es6$promise$asap$$setScheduler;
+    lib$es6$promise$promise$$Promise._setAsap = lib$es6$promise$asap$$setAsap;
+    lib$es6$promise$promise$$Promise._asap = lib$es6$promise$asap$$asap;
+
+    lib$es6$promise$promise$$Promise.prototype = {
+      constructor: lib$es6$promise$promise$$Promise,
+
+    /**
+      The primary way of interacting with a promise is through its `then` method,
+      which registers callbacks to receive either a promise's eventual value or the
+      reason why the promise cannot be fulfilled.
+
+      ```js
+      findUser().then(function(user){
+        // user is available
+      }, function(reason){
+        // user is unavailable, and you are given the reason why
+      });
+      ```
+
+      Chaining
+      --------
+
+      The return value of `then` is itself a promise.  This second, 'downstream'
+      promise is resolved with the return value of the first promise's fulfillment
+      or rejection handler, or rejected if the handler throws an exception.
+
+      ```js
+      findUser().then(function (user) {
+        return user.name;
+      }, function (reason) {
+        return 'default name';
+      }).then(function (userName) {
+        // If `findUser` fulfilled, `userName` will be the user's name, otherwise it
+        // will be `'default name'`
+      });
+
+      findUser().then(function (user) {
+        throw new Error('Found user, but still unhappy');
+      }, function (reason) {
+        throw new Error('`findUser` rejected and we're unhappy');
+      }).then(function (value) {
+        // never reached
+      }, function (reason) {
+        // if `findUser` fulfilled, `reason` will be 'Found user, but still unhappy'.
+        // If `findUser` rejected, `reason` will be '`findUser` rejected and we're unhappy'.
+      });
+      ```
+      If the downstream promise does not specify a rejection handler, rejection reasons will be propagated further downstream.
+
+      ```js
+      findUser().then(function (user) {
+        throw new PedagogicalException('Upstream error');
+      }).then(function (value) {
+        // never reached
+      }).then(function (value) {
+        // never reached
+      }, function (reason) {
+        // The `PedgagocialException` is propagated all the way down to here
+      });
+      ```
+
+      Assimilation
+      ------------
+
+      Sometimes the value you want to propagate to a downstream promise can only be
+      retrieved asynchronously. This can be achieved by returning a promise in the
+      fulfillment or rejection handler. The downstream promise will then be pending
+      until the returned promise is settled. This is called *assimilation*.
+
+      ```js
+      findUser().then(function (user) {
+        return findCommentsByAuthor(user);
+      }).then(function (comments) {
+        // The user's comments are now available
+      });
+      ```
+
+      If the assimliated promise rejects, then the downstream promise will also reject.
+
+      ```js
+      findUser().then(function (user) {
+        return findCommentsByAuthor(user);
+      }).then(function (comments) {
+        // If `findCommentsByAuthor` fulfills, we'll have the value here
+      }, function (reason) {
+        // If `findCommentsByAuthor` rejects, we'll have the reason here
+      });
+      ```
+
+      Simple Example
+      --------------
+
+      Synchronous Example
+
+      ```javascript
+      var result;
+
+      try {
+        result = findResult();
+        // success
+      } catch(reason) {
+        // failure
+      }
+      ```
+
+      Errback Example
+
+      ```js
+      findResult(function(result, err){
+        if (err) {
+          // failure
+        } else {
+          // success
+        }
+      });
+      ```
+
+      Promise Example;
+
+      ```javascript
+      findResult().then(function(result){
+        // success
+      }, function(reason){
+        // failure
+      });
+      ```
+
+      Advanced Example
+      --------------
+
+      Synchronous Example
+
+      ```javascript
+      var author, books;
+
+      try {
+        author = findAuthor();
+        books  = findBooksByAuthor(author);
+        // success
+      } catch(reason) {
+        // failure
+      }
+      ```
+
+      Errback Example
+
+      ```js
+
+      function foundBooks(books) {
+
+      }
+
+      function failure(reason) {
+
+      }
+
+      findAuthor(function(author, err){
+        if (err) {
+          failure(err);
+          // failure
+        } else {
+          try {
+            findBoooksByAuthor(author, function(books, err) {
+              if (err) {
+                failure(err);
+              } else {
+                try {
+                  foundBooks(books);
+                } catch(reason) {
+                  failure(reason);
+                }
+              }
+            });
+          } catch(error) {
+            failure(err);
+          }
+          // success
+        }
+      });
+      ```
+
+      Promise Example;
+
+      ```javascript
+      findAuthor().
+        then(findBooksByAuthor).
+        then(function(books){
+          // found books
+      }).catch(function(reason){
+        // something went wrong
+      });
+      ```
+
+      @method then
+      @param {Function} onFulfilled
+      @param {Function} onRejected
+      Useful for tooling.
+      @return {Promise}
+    */
+      then: function(onFulfillment, onRejection) {
+        var parent = this;
+        var state = parent._state;
+
+        if (state === lib$es6$promise$$internal$$FULFILLED && !onFulfillment || state === lib$es6$promise$$internal$$REJECTED && !onRejection) {
+          return this;
+        }
+
+        var child = new this.constructor(lib$es6$promise$$internal$$noop);
+        var result = parent._result;
+
+        if (state) {
+          var callback = arguments[state - 1];
+          lib$es6$promise$asap$$asap(function(){
+            lib$es6$promise$$internal$$invokeCallback(state, child, callback, result);
+          });
+        } else {
+          lib$es6$promise$$internal$$subscribe(parent, child, onFulfillment, onRejection);
+        }
+
+        return child;
+      },
+
+    /**
+      `catch` is simply sugar for `then(undefined, onRejection)` which makes it the same
+      as the catch block of a try/catch statement.
+
+      ```js
+      function findAuthor(){
+        throw new Error('couldn't find that author');
+      }
+
+      // synchronous
+      try {
+        findAuthor();
+      } catch(reason) {
+        // something went wrong
+      }
+
+      // async with promises
+      findAuthor().catch(function(reason){
+        // something went wrong
+      });
+      ```
+
+      @method catch
+      @param {Function} onRejection
+      Useful for tooling.
+      @return {Promise}
+    */
+      'catch': function(onRejection) {
+        return this.then(null, onRejection);
+      }
+    };
+    function lib$es6$promise$polyfill$$polyfill() {
+      var local;
+
+      if (typeof global !== 'undefined') {
+          local = global;
+      } else if (typeof self !== 'undefined') {
+          local = self;
+      } else {
+          try {
+              local = Function('return this')();
+          } catch (e) {
+              throw new Error('polyfill failed because global object is unavailable in this environment');
+          }
+      }
+
+      var P = local.Promise;
+
+      if (P && Object.prototype.toString.call(P.resolve()) === '[object Promise]' && !P.cast) {
+        return;
+      }
+
+      local.Promise = lib$es6$promise$promise$$default;
+    }
+    var lib$es6$promise$polyfill$$default = lib$es6$promise$polyfill$$polyfill;
+
+    var lib$es6$promise$umd$$ES6Promise = {
+      'Promise': lib$es6$promise$promise$$default,
+      'polyfill': lib$es6$promise$polyfill$$default
+    };
+
+    /* global define:true module:true window: true */
+    if (typeof define === 'function' && define['amd']) {
+      define(function() { return lib$es6$promise$umd$$ES6Promise; });
+    } else if (typeof module !== 'undefined' && module['exports']) {
+      module['exports'] = lib$es6$promise$umd$$ES6Promise;
+    } else if (typeof this !== 'undefined') {
+      this['ES6Promise'] = lib$es6$promise$umd$$ES6Promise;
+    }
+
+    lib$es6$promise$polyfill$$default();
+}).call(this);
+