Remove golang vendored directory (#18277)

* rm go vendor

* fix drone yaml

* add to gitignore

9 files changed, 0 insertions, 2132 deletions

diff --git a/vendor/github.com/nfnt/resize/.travis.yml b/vendor/github.com/nfnt/resize/.travis.yml
deleted file mode 100644
index 5ff08e7e4e..0000000000
--- a/vendor/github.com/nfnt/resize/.travis.yml
+++ /dev/null
@@ -1,7 +0,0 @@
-language: go
-
-go:
-  - "1.x"
-  - "1.1"
-  - "1.4"
-  - "1.10"
diff --git a/vendor/github.com/nfnt/resize/LICENSE b/vendor/github.com/nfnt/resize/LICENSE
deleted file mode 100644
index 7836cad5ff..0000000000
--- a/vendor/github.com/nfnt/resize/LICENSE
+++ /dev/null
@@ -1,13 +0,0 @@
-Copyright (c) 2012, Jan Schlicht <jan.schlicht@gmail.com>
-
-Permission to use, copy, modify, and/or distribute this software for any purpose
-with or without fee is hereby granted, provided that the above copyright notice
-and this permission notice appear in all copies.
-
-THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
-REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
-FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
-INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
-OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
-TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
-THIS SOFTWARE.
diff --git a/vendor/github.com/nfnt/resize/README.md b/vendor/github.com/nfnt/resize/README.md
deleted file mode 100644
index 372777d2eb..0000000000
--- a/vendor/github.com/nfnt/resize/README.md
+++ /dev/null
@@ -1,151 +0,0 @@
-# This package is no longer being updated! Please look for alternatives if that bothers you.
-
-Resize
-======
-
-Image resizing for the [Go programming language](http://golang.org) with common interpolation methods.
-
-[![Build Status](https://travis-ci.org/nfnt/resize.svg)](https://travis-ci.org/nfnt/resize)
-
-Installation
-------------
-
-```bash
-$ go get github.com/nfnt/resize
-```
-
-It's that easy!
-
-Usage
------
-
-This package needs at least Go 1.1. Import package with
-
-```go
-import "github.com/nfnt/resize"
-```
-
-The resize package provides 2 functions:
-
-* `resize.Resize` creates a scaled image with new dimensions (`width`, `height`) using the interpolation function `interp`.
-  If either `width` or `height` is set to 0, it will be set to an aspect ratio preserving value.
-* `resize.Thumbnail` downscales an image preserving its aspect ratio to the maximum dimensions (`maxWidth`, `maxHeight`).
-  It will return the original image if original sizes are smaller than the provided dimensions.
-
-```go
-resize.Resize(width, height uint, img image.Image, interp resize.InterpolationFunction) image.Image
-resize.Thumbnail(maxWidth, maxHeight uint, img image.Image, interp resize.InterpolationFunction) image.Image
-```
-
-The provided interpolation functions are (from fast to slow execution time)
-
-- `NearestNeighbor`: [Nearest-neighbor interpolation](http://en.wikipedia.org/wiki/Nearest-neighbor_interpolation)
-- `Bilinear`: [Bilinear interpolation](http://en.wikipedia.org/wiki/Bilinear_interpolation)
-- `Bicubic`: [Bicubic interpolation](http://en.wikipedia.org/wiki/Bicubic_interpolation)
-- `MitchellNetravali`: [Mitchell-Netravali interpolation](http://dl.acm.org/citation.cfm?id=378514)
-- `Lanczos2`: [Lanczos resampling](http://en.wikipedia.org/wiki/Lanczos_resampling) with a=2
-- `Lanczos3`: [Lanczos resampling](http://en.wikipedia.org/wiki/Lanczos_resampling) with a=3
-
-Which of these methods gives the best results depends on your use case.
-
-Sample usage:
-
-```go
-package main
-
-import (
-	"github.com/nfnt/resize"
-	"image/jpeg"
-	"log"
-	"os"
-)
-
-func main() {
-	// open "test.jpg"
-	file, err := os.Open("test.jpg")
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	// decode jpeg into image.Image
-	img, err := jpeg.Decode(file)
-	if err != nil {
-		log.Fatal(err)
-	}
-	file.Close()
-
-	// resize to width 1000 using Lanczos resampling
-	// and preserve aspect ratio
-	m := resize.Resize(1000, 0, img, resize.Lanczos3)
-
-	out, err := os.Create("test_resized.jpg")
-	if err != nil {
-		log.Fatal(err)
-	}
-	defer out.Close()
-
-	// write new image to file
-	jpeg.Encode(out, m, nil)
-}
-```
-
-Caveats
--------
-
-* Optimized access routines are used for `image.RGBA`, `image.NRGBA`, `image.RGBA64`, `image.NRGBA64`, `image.YCbCr`, `image.Gray`, and `image.Gray16` types. All other image types are accessed in a generic way that will result in slow processing speed.
-* JPEG images are stored in `image.YCbCr`. This image format stores data in a way that will decrease processing speed. A resize may be up to 2 times slower than with `image.RGBA`. 
-
-
-Downsizing Samples
--------
-
-Downsizing is not as simple as it might look like. Images have to be filtered before they are scaled down, otherwise aliasing might occur.
-Filtering is highly subjective: Applying too much will blur the whole image, too little will make aliasing become apparent.
-Resize tries to provide sane defaults that should suffice in most cases.
-
-### Artificial sample
-
-Original image
-![Rings](http://nfnt.github.com/img/rings_lg_orig.png)
-
-<table>
-<tr>
-<th><img src="http://nfnt.github.com/img/rings_300_NearestNeighbor.png" /><br>Nearest-Neighbor</th>
-<th><img src="http://nfnt.github.com/img/rings_300_Bilinear.png" /><br>Bilinear</th>
-</tr>
-<tr>
-<th><img src="http://nfnt.github.com/img/rings_300_Bicubic.png" /><br>Bicubic</th>
-<th><img src="http://nfnt.github.com/img/rings_300_MitchellNetravali.png" /><br>Mitchell-Netravali</th>
-</tr>
-<tr>
-<th><img src="http://nfnt.github.com/img/rings_300_Lanczos2.png" /><br>Lanczos2</th>
-<th><img src="http://nfnt.github.com/img/rings_300_Lanczos3.png" /><br>Lanczos3</th>
-</tr>
-</table>
-
-### Real-Life sample
-
-Original image  
-![Original](http://nfnt.github.com/img/IMG_3694_720.jpg)
-
-<table>
-<tr>
-<th><img src="http://nfnt.github.com/img/IMG_3694_300_NearestNeighbor.png" /><br>Nearest-Neighbor</th>
-<th><img src="http://nfnt.github.com/img/IMG_3694_300_Bilinear.png" /><br>Bilinear</th>
-</tr>
-<tr>
-<th><img src="http://nfnt.github.com/img/IMG_3694_300_Bicubic.png" /><br>Bicubic</th>
-<th><img src="http://nfnt.github.com/img/IMG_3694_300_MitchellNetravali.png" /><br>Mitchell-Netravali</th>
-</tr>
-<tr>
-<th><img src="http://nfnt.github.com/img/IMG_3694_300_Lanczos2.png" /><br>Lanczos2</th>
-<th><img src="http://nfnt.github.com/img/IMG_3694_300_Lanczos3.png" /><br>Lanczos3</th>
-</tr>
-</table>
-
-
-License
--------
-
-Copyright (c) 2012 Jan Schlicht <janschlicht@gmail.com>
-Resize is released under a MIT style license.
diff --git a/vendor/github.com/nfnt/resize/converter.go b/vendor/github.com/nfnt/resize/converter.go
deleted file mode 100644
index f9c520d097..0000000000
--- a/vendor/github.com/nfnt/resize/converter.go
+++ /dev/null
@@ -1,438 +0,0 @@
-/*
-Copyright (c) 2012, Jan Schlicht <jan.schlicht@gmail.com>
-
-Permission to use, copy, modify, and/or distribute this software for any purpose
-with or without fee is hereby granted, provided that the above copyright notice
-and this permission notice appear in all copies.
-
-THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
-REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
-FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
-INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
-OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
-TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
-THIS SOFTWARE.
-*/
-
-package resize
-
-import "image"
-
-// Keep value in [0,255] range.
-func clampUint8(in int32) uint8 {
-	// casting a negative int to an uint will result in an overflown
-	// large uint. this behavior will be exploited here and in other functions
-	// to achieve a higher performance.
-	if uint32(in) < 256 {
-		return uint8(in)
-	}
-	if in > 255 {
-		return 255
-	}
-	return 0
-}
-
-// Keep value in [0,65535] range.
-func clampUint16(in int64) uint16 {
-	if uint64(in) < 65536 {
-		return uint16(in)
-	}
-	if in > 65535 {
-		return 65535
-	}
-	return 0
-}
-
-func resizeGeneric(in image.Image, out *image.RGBA64, scale float64, coeffs []int32, offset []int, filterLength int) {
-	newBounds := out.Bounds()
-	maxX := in.Bounds().Dx() - 1
-
-	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
-		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
-			var rgba [4]int64
-			var sum int64
-			start := offset[y]
-			ci := y * filterLength
-			for i := 0; i < filterLength; i++ {
-				coeff := coeffs[ci+i]
-				if coeff != 0 {
-					xi := start + i
-					switch {
-					case xi < 0:
-						xi = 0
-					case xi >= maxX:
-						xi = maxX
-					}
-
-					r, g, b, a := in.At(xi+in.Bounds().Min.X, x+in.Bounds().Min.Y).RGBA()
-
-					rgba[0] += int64(coeff) * int64(r)
-					rgba[1] += int64(coeff) * int64(g)
-					rgba[2] += int64(coeff) * int64(b)
-					rgba[3] += int64(coeff) * int64(a)
-					sum += int64(coeff)
-				}
-			}
-
-			offset := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*8
-
-			value := clampUint16(rgba[0] / sum)
-			out.Pix[offset+0] = uint8(value >> 8)
-			out.Pix[offset+1] = uint8(value)
-			value = clampUint16(rgba[1] / sum)
-			out.Pix[offset+2] = uint8(value >> 8)
-			out.Pix[offset+3] = uint8(value)
-			value = clampUint16(rgba[2] / sum)
-			out.Pix[offset+4] = uint8(value >> 8)
-			out.Pix[offset+5] = uint8(value)
-			value = clampUint16(rgba[3] / sum)
-			out.Pix[offset+6] = uint8(value >> 8)
-			out.Pix[offset+7] = uint8(value)
-		}
-	}
-}
-
-func resizeRGBA(in *image.RGBA, out *image.RGBA, scale float64, coeffs []int16, offset []int, filterLength int) {
-	newBounds := out.Bounds()
-	maxX := in.Bounds().Dx() - 1
-
-	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
-		row := in.Pix[x*in.Stride:]
-		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
-			var rgba [4]int32
-			var sum int32
-			start := offset[y]
-			ci := y * filterLength
-			for i := 0; i < filterLength; i++ {
-				coeff := coeffs[ci+i]
-				if coeff != 0 {
-					xi := start + i
-					switch {
-					case uint(xi) < uint(maxX):
-						xi *= 4
-					case xi >= maxX:
-						xi = 4 * maxX
-					default:
-						xi = 0
-					}
-
-					rgba[0] += int32(coeff) * int32(row[xi+0])
-					rgba[1] += int32(coeff) * int32(row[xi+1])
-					rgba[2] += int32(coeff) * int32(row[xi+2])
-					rgba[3] += int32(coeff) * int32(row[xi+3])
-					sum += int32(coeff)
-				}
-			}
-
-			xo := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*4
-
-			out.Pix[xo+0] = clampUint8(rgba[0] / sum)
-			out.Pix[xo+1] = clampUint8(rgba[1] / sum)
-			out.Pix[xo+2] = clampUint8(rgba[2] / sum)
-			out.Pix[xo+3] = clampUint8(rgba[3] / sum)
-		}
-	}
-}
-
-func resizeNRGBA(in *image.NRGBA, out *image.RGBA, scale float64, coeffs []int16, offset []int, filterLength int) {
-	newBounds := out.Bounds()
-	maxX := in.Bounds().Dx() - 1
-
-	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
-		row := in.Pix[x*in.Stride:]
-		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
-			var rgba [4]int32
-			var sum int32
-			start := offset[y]
-			ci := y * filterLength
-			for i := 0; i < filterLength; i++ {
-				coeff := coeffs[ci+i]
-				if coeff != 0 {
-					xi := start + i
-					switch {
-					case uint(xi) < uint(maxX):
-						xi *= 4
-					case xi >= maxX:
-						xi = 4 * maxX
-					default:
-						xi = 0
-					}
-
-					// Forward alpha-premultiplication
-					a := int32(row[xi+3])
-					r := int32(row[xi+0]) * a
-					r /= 0xff
-					g := int32(row[xi+1]) * a
-					g /= 0xff
-					b := int32(row[xi+2]) * a
-					b /= 0xff
-
-					rgba[0] += int32(coeff) * r
-					rgba[1] += int32(coeff) * g
-					rgba[2] += int32(coeff) * b
-					rgba[3] += int32(coeff) * a
-					sum += int32(coeff)
-				}
-			}
-
-			xo := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*4
-
-			out.Pix[xo+0] = clampUint8(rgba[0] / sum)
-			out.Pix[xo+1] = clampUint8(rgba[1] / sum)
-			out.Pix[xo+2] = clampUint8(rgba[2] / sum)
-			out.Pix[xo+3] = clampUint8(rgba[3] / sum)
-		}
-	}
-}
-
-func resizeRGBA64(in *image.RGBA64, out *image.RGBA64, scale float64, coeffs []int32, offset []int, filterLength int) {
-	newBounds := out.Bounds()
-	maxX := in.Bounds().Dx() - 1
-
-	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
-		row := in.Pix[x*in.Stride:]
-		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
-			var rgba [4]int64
-			var sum int64
-			start := offset[y]
-			ci := y * filterLength
-			for i := 0; i < filterLength; i++ {
-				coeff := coeffs[ci+i]
-				if coeff != 0 {
-					xi := start + i
-					switch {
-					case uint(xi) < uint(maxX):
-						xi *= 8
-					case xi >= maxX:
-						xi = 8 * maxX
-					default:
-						xi = 0
-					}
-
-					rgba[0] += int64(coeff) * (int64(row[xi+0])<<8 | int64(row[xi+1]))
-					rgba[1] += int64(coeff) * (int64(row[xi+2])<<8 | int64(row[xi+3]))
-					rgba[2] += int64(coeff) * (int64(row[xi+4])<<8 | int64(row[xi+5]))
-					rgba[3] += int64(coeff) * (int64(row[xi+6])<<8 | int64(row[xi+7]))
-					sum += int64(coeff)
-				}
-			}
-
-			xo := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*8
-
-			value := clampUint16(rgba[0] / sum)
-			out.Pix[xo+0] = uint8(value >> 8)
-			out.Pix[xo+1] = uint8(value)
-			value = clampUint16(rgba[1] / sum)
-			out.Pix[xo+2] = uint8(value >> 8)
-			out.Pix[xo+3] = uint8(value)
-			value = clampUint16(rgba[2] / sum)
-			out.Pix[xo+4] = uint8(value >> 8)
-			out.Pix[xo+5] = uint8(value)
-			value = clampUint16(rgba[3] / sum)
-			out.Pix[xo+6] = uint8(value >> 8)
-			out.Pix[xo+7] = uint8(value)
-		}
-	}
-}
-
-func resizeNRGBA64(in *image.NRGBA64, out *image.RGBA64, scale float64, coeffs []int32, offset []int, filterLength int) {
-	newBounds := out.Bounds()
-	maxX := in.Bounds().Dx() - 1
-
-	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
-		row := in.Pix[x*in.Stride:]
-		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
-			var rgba [4]int64
-			var sum int64
-			start := offset[y]
-			ci := y * filterLength
-			for i := 0; i < filterLength; i++ {
-				coeff := coeffs[ci+i]
-				if coeff != 0 {
-					xi := start + i
-					switch {
-					case uint(xi) < uint(maxX):
-						xi *= 8
-					case xi >= maxX:
-						xi = 8 * maxX
-					default:
-						xi = 0
-					}
-
-					// Forward alpha-premultiplication
-					a := int64(uint16(row[xi+6])<<8 | uint16(row[xi+7]))
-					r := int64(uint16(row[xi+0])<<8|uint16(row[xi+1])) * a
-					r /= 0xffff
-					g := int64(uint16(row[xi+2])<<8|uint16(row[xi+3])) * a
-					g /= 0xffff
-					b := int64(uint16(row[xi+4])<<8|uint16(row[xi+5])) * a
-					b /= 0xffff
-
-					rgba[0] += int64(coeff) * r
-					rgba[1] += int64(coeff) * g
-					rgba[2] += int64(coeff) * b
-					rgba[3] += int64(coeff) * a
-					sum += int64(coeff)
-				}
-			}
-
-			xo := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*8
-
-			value := clampUint16(rgba[0] / sum)
-			out.Pix[xo+0] = uint8(value >> 8)
-			out.Pix[xo+1] = uint8(value)
-			value = clampUint16(rgba[1] / sum)
-			out.Pix[xo+2] = uint8(value >> 8)
-			out.Pix[xo+3] = uint8(value)
-			value = clampUint16(rgba[2] / sum)
-			out.Pix[xo+4] = uint8(value >> 8)
-			out.Pix[xo+5] = uint8(value)
-			value = clampUint16(rgba[3] / sum)
-			out.Pix[xo+6] = uint8(value >> 8)
-			out.Pix[xo+7] = uint8(value)
-		}
-	}
-}
-
-func resizeGray(in *image.Gray, out *image.Gray, scale float64, coeffs []int16, offset []int, filterLength int) {
-	newBounds := out.Bounds()
-	maxX := in.Bounds().Dx() - 1
-
-	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
-		row := in.Pix[(x-newBounds.Min.X)*in.Stride:]
-		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
-			var gray int32
-			var sum int32
-			start := offset[y]
-			ci := y * filterLength
-			for i := 0; i < filterLength; i++ {
-				coeff := coeffs[ci+i]
-				if coeff != 0 {
-					xi := start + i
-					switch {
-					case xi < 0:
-						xi = 0
-					case xi >= maxX:
-						xi = maxX
-					}
-					gray += int32(coeff) * int32(row[xi])
-					sum += int32(coeff)
-				}
-			}
-
-			offset := (y-newBounds.Min.Y)*out.Stride + (x - newBounds.Min.X)
-			out.Pix[offset] = clampUint8(gray / sum)
-		}
-	}
-}
-
-func resizeGray16(in *image.Gray16, out *image.Gray16, scale float64, coeffs []int32, offset []int, filterLength int) {
-	newBounds := out.Bounds()
-	maxX := in.Bounds().Dx() - 1
-
-	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
-		row := in.Pix[x*in.Stride:]
-		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
-			var gray int64
-			var sum int64
-			start := offset[y]
-			ci := y * filterLength
-			for i := 0; i < filterLength; i++ {
-				coeff := coeffs[ci+i]
-				if coeff != 0 {
-					xi := start + i
-					switch {
-					case uint(xi) < uint(maxX):
-						xi *= 2
-					case xi >= maxX:
-						xi = 2 * maxX
-					default:
-						xi = 0
-					}
-					gray += int64(coeff) * int64(uint16(row[xi+0])<<8|uint16(row[xi+1]))
-					sum += int64(coeff)
-				}
-			}
-
-			offset := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*2
-			value := clampUint16(gray / sum)
-			out.Pix[offset+0] = uint8(value >> 8)
-			out.Pix[offset+1] = uint8(value)
-		}
-	}
-}
-
-func resizeYCbCr(in *ycc, out *ycc, scale float64, coeffs []int16, offset []int, filterLength int) {
-	newBounds := out.Bounds()
-	maxX := in.Bounds().Dx() - 1
-
-	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
-		row := in.Pix[x*in.Stride:]
-		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
-			var p [3]int32
-			var sum int32
-			start := offset[y]
-			ci := y * filterLength
-			for i := 0; i < filterLength; i++ {
-				coeff := coeffs[ci+i]
-				if coeff != 0 {
-					xi := start + i
-					switch {
-					case uint(xi) < uint(maxX):
-						xi *= 3
-					case xi >= maxX:
-						xi = 3 * maxX
-					default:
-						xi = 0
-					}
-					p[0] += int32(coeff) * int32(row[xi+0])
-					p[1] += int32(coeff) * int32(row[xi+1])
-					p[2] += int32(coeff) * int32(row[xi+2])
-					sum += int32(coeff)
-				}
-			}
-
-			xo := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*3
-			out.Pix[xo+0] = clampUint8(p[0] / sum)
-			out.Pix[xo+1] = clampUint8(p[1] / sum)
-			out.Pix[xo+2] = clampUint8(p[2] / sum)
-		}
-	}
-}
-
-func nearestYCbCr(in *ycc, out *ycc, scale float64, coeffs []bool, offset []int, filterLength int) {
-	newBounds := out.Bounds()
-	maxX := in.Bounds().Dx() - 1
-
-	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
-		row := in.Pix[x*in.Stride:]
-		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
-			var p [3]float32
-			var sum float32
-			start := offset[y]
-			ci := y * filterLength
-			for i := 0; i < filterLength; i++ {
-				if coeffs[ci+i] {
-					xi := start + i
-					switch {
-					case uint(xi) < uint(maxX):
-						xi *= 3
-					case xi >= maxX:
-						xi = 3 * maxX
-					default:
-						xi = 0
-					}
-					p[0] += float32(row[xi+0])
-					p[1] += float32(row[xi+1])
-					p[2] += float32(row[xi+2])
-					sum++
-				}
-			}
-
-			xo := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*3
-			out.Pix[xo+0] = floatToUint8(p[0] / sum)
-			out.Pix[xo+1] = floatToUint8(p[1] / sum)
-			out.Pix[xo+2] = floatToUint8(p[2] / sum)
-		}
-	}
-}
diff --git a/vendor/github.com/nfnt/resize/filters.go b/vendor/github.com/nfnt/resize/filters.go
deleted file mode 100644
index 4ce04e389f..0000000000
--- a/vendor/github.com/nfnt/resize/filters.go
+++ /dev/null
@@ -1,143 +0,0 @@
-/*
-Copyright (c) 2012, Jan Schlicht <jan.schlicht@gmail.com>
-
-Permission to use, copy, modify, and/or distribute this software for any purpose
-with or without fee is hereby granted, provided that the above copyright notice
-and this permission notice appear in all copies.
-
-THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
-REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
-FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
-INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
-OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
-TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
-THIS SOFTWARE.
-*/
-
-package resize
-
-import (
-	"math"
-)
-
-func nearest(in float64) float64 {
-	if in >= -0.5 && in < 0.5 {
-		return 1
-	}
-	return 0
-}
-
-func linear(in float64) float64 {
-	in = math.Abs(in)
-	if in <= 1 {
-		return 1 - in
-	}
-	return 0
-}
-
-func cubic(in float64) float64 {
-	in = math.Abs(in)
-	if in <= 1 {
-		return in*in*(1.5*in-2.5) + 1.0
-	}
-	if in <= 2 {
-		return in*(in*(2.5-0.5*in)-4.0) + 2.0
-	}
-	return 0
-}
-
-func mitchellnetravali(in float64) float64 {
-	in = math.Abs(in)
-	if in <= 1 {
-		return (7.0*in*in*in - 12.0*in*in + 5.33333333333) * 0.16666666666
-	}
-	if in <= 2 {
-		return (-2.33333333333*in*in*in + 12.0*in*in - 20.0*in + 10.6666666667) * 0.16666666666
-	}
-	return 0
-}
-
-func sinc(x float64) float64 {
-	x = math.Abs(x) * math.Pi
-	if x >= 1.220703e-4 {
-		return math.Sin(x) / x
-	}
-	return 1
-}
-
-func lanczos2(in float64) float64 {
-	if in > -2 && in < 2 {
-		return sinc(in) * sinc(in*0.5)
-	}
-	return 0
-}
-
-func lanczos3(in float64) float64 {
-	if in > -3 && in < 3 {
-		return sinc(in) * sinc(in*0.3333333333333333)
-	}
-	return 0
-}
-
-// range [-256,256]
-func createWeights8(dy, filterLength int, blur, scale float64, kernel func(float64) float64) ([]int16, []int, int) {
-	filterLength = filterLength * int(math.Max(math.Ceil(blur*scale), 1))
-	filterFactor := math.Min(1./(blur*scale), 1)
-
-	coeffs := make([]int16, dy*filterLength)
-	start := make([]int, dy)
-	for y := 0; y < dy; y++ {
-		interpX := scale*(float64(y)+0.5) - 0.5
-		start[y] = int(interpX) - filterLength/2 + 1
-		interpX -= float64(start[y])
-		for i := 0; i < filterLength; i++ {
-			in := (interpX - float64(i)) * filterFactor
-			coeffs[y*filterLength+i] = int16(kernel(in) * 256)
-		}
-	}
-
-	return coeffs, start, filterLength
-}
-
-// range [-65536,65536]
-func createWeights16(dy, filterLength int, blur, scale float64, kernel func(float64) float64) ([]int32, []int, int) {
-	filterLength = filterLength * int(math.Max(math.Ceil(blur*scale), 1))
-	filterFactor := math.Min(1./(blur*scale), 1)
-
-	coeffs := make([]int32, dy*filterLength)
-	start := make([]int, dy)
-	for y := 0; y < dy; y++ {
-		interpX := scale*(float64(y)+0.5) - 0.5
-		start[y] = int(interpX) - filterLength/2 + 1
-		interpX -= float64(start[y])
-		for i := 0; i < filterLength; i++ {
-			in := (interpX - float64(i)) * filterFactor
-			coeffs[y*filterLength+i] = int32(kernel(in) * 65536)
-		}
-	}
-
-	return coeffs, start, filterLength
-}
-
-func createWeightsNearest(dy, filterLength int, blur, scale float64) ([]bool, []int, int) {
-	filterLength = filterLength * int(math.Max(math.Ceil(blur*scale), 1))
-	filterFactor := math.Min(1./(blur*scale), 1)
-
-	coeffs := make([]bool, dy*filterLength)
-	start := make([]int, dy)
-	for y := 0; y < dy; y++ {
-		interpX := scale*(float64(y)+0.5) - 0.5
-		start[y] = int(interpX) - filterLength/2 + 1
-		interpX -= float64(start[y])
-		for i := 0; i < filterLength; i++ {
-			in := (interpX - float64(i)) * filterFactor
-			if in >= -0.5 && in < 0.5 {
-				coeffs[y*filterLength+i] = true
-			} else {
-				coeffs[y*filterLength+i] = false
-			}
-		}
-	}
-
-	return coeffs, start, filterLength
-}
diff --git a/vendor/github.com/nfnt/resize/nearest.go b/vendor/github.com/nfnt/resize/nearest.go
deleted file mode 100644
index 888039d852..0000000000
--- a/vendor/github.com/nfnt/resize/nearest.go
+++ /dev/null
@@ -1,318 +0,0 @@
-/*
-Copyright (c) 2014, Charlie Vieth <charlie.vieth@gmail.com>
-
-Permission to use, copy, modify, and/or distribute this software for any purpose
-with or without fee is hereby granted, provided that the above copyright notice
-and this permission notice appear in all copies.
-
-THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
-REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
-FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
-INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
-OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
-TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
-THIS SOFTWARE.
-*/
-
-package resize
-
-import "image"
-
-func floatToUint8(x float32) uint8 {
-	// Nearest-neighbor values are always
-	// positive no need to check lower-bound.
-	if x > 0xfe {
-		return 0xff
-	}
-	return uint8(x)
-}
-
-func floatToUint16(x float32) uint16 {
-	if x > 0xfffe {
-		return 0xffff
-	}
-	return uint16(x)
-}
-
-func nearestGeneric(in image.Image, out *image.RGBA64, scale float64, coeffs []bool, offset []int, filterLength int) {
-	newBounds := out.Bounds()
-	maxX := in.Bounds().Dx() - 1
-
-	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
-		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
-			var rgba [4]float32
-			var sum float32
-			start := offset[y]
-			ci := y * filterLength
-			for i := 0; i < filterLength; i++ {
-				if coeffs[ci+i] {
-					xi := start + i
-					switch {
-					case xi < 0:
-						xi = 0
-					case xi >= maxX:
-						xi = maxX
-					}
-					r, g, b, a := in.At(xi+in.Bounds().Min.X, x+in.Bounds().Min.Y).RGBA()
-					rgba[0] += float32(r)
-					rgba[1] += float32(g)
-					rgba[2] += float32(b)
-					rgba[3] += float32(a)
-					sum++
-				}
-			}
-
-			offset := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*8
-			value := floatToUint16(rgba[0] / sum)
-			out.Pix[offset+0] = uint8(value >> 8)
-			out.Pix[offset+1] = uint8(value)
-			value = floatToUint16(rgba[1] / sum)
-			out.Pix[offset+2] = uint8(value >> 8)
-			out.Pix[offset+3] = uint8(value)
-			value = floatToUint16(rgba[2] / sum)
-			out.Pix[offset+4] = uint8(value >> 8)
-			out.Pix[offset+5] = uint8(value)
-			value = floatToUint16(rgba[3] / sum)
-			out.Pix[offset+6] = uint8(value >> 8)
-			out.Pix[offset+7] = uint8(value)
-		}
-	}
-}
-
-func nearestRGBA(in *image.RGBA, out *image.RGBA, scale float64, coeffs []bool, offset []int, filterLength int) {
-	newBounds := out.Bounds()
-	maxX := in.Bounds().Dx() - 1
-
-	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
-		row := in.Pix[x*in.Stride:]
-		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
-			var rgba [4]float32
-			var sum float32
-			start := offset[y]
-			ci := y * filterLength
-			for i := 0; i < filterLength; i++ {
-				if coeffs[ci+i] {
-					xi := start + i
-					switch {
-					case uint(xi) < uint(maxX):
-						xi *= 4
-					case xi >= maxX:
-						xi = 4 * maxX
-					default:
-						xi = 0
-					}
-					rgba[0] += float32(row[xi+0])
-					rgba[1] += float32(row[xi+1])
-					rgba[2] += float32(row[xi+2])
-					rgba[3] += float32(row[xi+3])
-					sum++
-				}
-			}
-
-			xo := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*4
-			out.Pix[xo+0] = floatToUint8(rgba[0] / sum)
-			out.Pix[xo+1] = floatToUint8(rgba[1] / sum)
-			out.Pix[xo+2] = floatToUint8(rgba[2] / sum)
-			out.Pix[xo+3] = floatToUint8(rgba[3] / sum)
-		}
-	}
-}
-
-func nearestNRGBA(in *image.NRGBA, out *image.NRGBA, scale float64, coeffs []bool, offset []int, filterLength int) {
-	newBounds := out.Bounds()
-	maxX := in.Bounds().Dx() - 1
-
-	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
-		row := in.Pix[x*in.Stride:]
-		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
-			var rgba [4]float32
-			var sum float32
-			start := offset[y]
-			ci := y * filterLength
-			for i := 0; i < filterLength; i++ {
-				if coeffs[ci+i] {
-					xi := start + i
-					switch {
-					case uint(xi) < uint(maxX):
-						xi *= 4
-					case xi >= maxX:
-						xi = 4 * maxX
-					default:
-						xi = 0
-					}
-					rgba[0] += float32(row[xi+0])
-					rgba[1] += float32(row[xi+1])
-					rgba[2] += float32(row[xi+2])
-					rgba[3] += float32(row[xi+3])
-					sum++
-				}
-			}
-
-			xo := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*4
-			out.Pix[xo+0] = floatToUint8(rgba[0] / sum)
-			out.Pix[xo+1] = floatToUint8(rgba[1] / sum)
-			out.Pix[xo+2] = floatToUint8(rgba[2] / sum)
-			out.Pix[xo+3] = floatToUint8(rgba[3] / sum)
-		}
-	}
-}
-
-func nearestRGBA64(in *image.RGBA64, out *image.RGBA64, scale float64, coeffs []bool, offset []int, filterLength int) {
-	newBounds := out.Bounds()
-	maxX := in.Bounds().Dx() - 1
-
-	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
-		row := in.Pix[x*in.Stride:]
-		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
-			var rgba [4]float32
-			var sum float32
-			start := offset[y]
-			ci := y * filterLength
-			for i := 0; i < filterLength; i++ {
-				if coeffs[ci+i] {
-					xi := start + i
-					switch {
-					case uint(xi) < uint(maxX):
-						xi *= 8
-					case xi >= maxX:
-						xi = 8 * maxX
-					default:
-						xi = 0
-					}
-					rgba[0] += float32(uint16(row[xi+0])<<8 | uint16(row[xi+1]))
-					rgba[1] += float32(uint16(row[xi+2])<<8 | uint16(row[xi+3]))
-					rgba[2] += float32(uint16(row[xi+4])<<8 | uint16(row[xi+5]))
-					rgba[3] += float32(uint16(row[xi+6])<<8 | uint16(row[xi+7]))
-					sum++
-				}
-			}
-
-			xo := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*8
-			value := floatToUint16(rgba[0] / sum)
-			out.Pix[xo+0] = uint8(value >> 8)
-			out.Pix[xo+1] = uint8(value)
-			value = floatToUint16(rgba[1] / sum)
-			out.Pix[xo+2] = uint8(value >> 8)
-			out.Pix[xo+3] = uint8(value)
-			value = floatToUint16(rgba[2] / sum)
-			out.Pix[xo+4] = uint8(value >> 8)
-			out.Pix[xo+5] = uint8(value)
-			value = floatToUint16(rgba[3] / sum)
-			out.Pix[xo+6] = uint8(value >> 8)
-			out.Pix[xo+7] = uint8(value)
-		}
-	}
-}
-
-func nearestNRGBA64(in *image.NRGBA64, out *image.NRGBA64, scale float64, coeffs []bool, offset []int, filterLength int) {
-	newBounds := out.Bounds()
-	maxX := in.Bounds().Dx() - 1
-
-	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
-		row := in.Pix[x*in.Stride:]
-		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
-			var rgba [4]float32
-			var sum float32
-			start := offset[y]
-			ci := y * filterLength
-			for i := 0; i < filterLength; i++ {
-				if coeffs[ci+i] {
-					xi := start + i
-					switch {
-					case uint(xi) < uint(maxX):
-						xi *= 8
-					case xi >= maxX:
-						xi = 8 * maxX
-					default:
-						xi = 0
-					}
-					rgba[0] += float32(uint16(row[xi+0])<<8 | uint16(row[xi+1]))
-					rgba[1] += float32(uint16(row[xi+2])<<8 | uint16(row[xi+3]))
-					rgba[2] += float32(uint16(row[xi+4])<<8 | uint16(row[xi+5]))
-					rgba[3] += float32(uint16(row[xi+6])<<8 | uint16(row[xi+7]))
-					sum++
-				}
-			}
-
-			xo := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*8
-			value := floatToUint16(rgba[0] / sum)
-			out.Pix[xo+0] = uint8(value >> 8)
-			out.Pix[xo+1] = uint8(value)
-			value = floatToUint16(rgba[1] / sum)
-			out.Pix[xo+2] = uint8(value >> 8)
-			out.Pix[xo+3] = uint8(value)
-			value = floatToUint16(rgba[2] / sum)
-			out.Pix[xo+4] = uint8(value >> 8)
-			out.Pix[xo+5] = uint8(value)
-			value = floatToUint16(rgba[3] / sum)
-			out.Pix[xo+6] = uint8(value >> 8)
-			out.Pix[xo+7] = uint8(value)
-		}
-	}
-}
-
-func nearestGray(in *image.Gray, out *image.Gray, scale float64, coeffs []bool, offset []int, filterLength int) {
-	newBounds := out.Bounds()
-	maxX := in.Bounds().Dx() - 1
-
-	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
-		row := in.Pix[x*in.Stride:]
-		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
-			var gray float32
-			var sum float32
-			start := offset[y]
-			ci := y * filterLength
-			for i := 0; i < filterLength; i++ {
-				if coeffs[ci+i] {
-					xi := start + i
-					switch {
-					case xi < 0:
-						xi = 0
-					case xi >= maxX:
-						xi = maxX
-					}
-					gray += float32(row[xi])
-					sum++
-				}
-			}
-
-			offset := (y-newBounds.Min.Y)*out.Stride + (x - newBounds.Min.X)
-			out.Pix[offset] = floatToUint8(gray / sum)
-		}
-	}
-}
-
-func nearestGray16(in *image.Gray16, out *image.Gray16, scale float64, coeffs []bool, offset []int, filterLength int) {
-	newBounds := out.Bounds()
-	maxX := in.Bounds().Dx() - 1
-
-	for x := newBounds.Min.X; x < newBounds.Max.X; x++ {
-		row := in.Pix[x*in.Stride:]
-		for y := newBounds.Min.Y; y < newBounds.Max.Y; y++ {
-			var gray float32
-			var sum float32
-			start := offset[y]
-			ci := y * filterLength
-			for i := 0; i < filterLength; i++ {
-				if coeffs[ci+i] {
-					xi := start + i
-					switch {
-					case uint(xi) < uint(maxX):
-						xi *= 2
-					case xi >= maxX:
-						xi = 2 * maxX
-					default:
-						xi = 0
-					}
-					gray += float32(uint16(row[xi+0])<<8 | uint16(row[xi+1]))
-					sum++
-				}
-			}
-
-			offset := (y-newBounds.Min.Y)*out.Stride + (x-newBounds.Min.X)*2
-			value := floatToUint16(gray / sum)
-			out.Pix[offset+0] = uint8(value >> 8)
-			out.Pix[offset+1] = uint8(value)
-		}
-	}
-}
diff --git a/vendor/github.com/nfnt/resize/resize.go b/vendor/github.com/nfnt/resize/resize.go
deleted file mode 100644
index 0d7fbf69a9..0000000000
--- a/vendor/github.com/nfnt/resize/resize.go
+++ /dev/null
@@ -1,620 +0,0 @@
-/*
-Copyright (c) 2012, Jan Schlicht <jan.schlicht@gmail.com>
-
-Permission to use, copy, modify, and/or distribute this software for any purpose
-with or without fee is hereby granted, provided that the above copyright notice
-and this permission notice appear in all copies.
-
-THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
-REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
-FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
-INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
-OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
-TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
-THIS SOFTWARE.
-*/
-
-// Package resize implements various image resizing methods.
-//
-// The package works with the Image interface described in the image package.
-// Various interpolation methods are provided and multiple processors may be
-// utilized in the computations.
-//
-// Example:
-//     imgResized := resize.Resize(1000, 0, imgOld, resize.MitchellNetravali)
-package resize
-
-import (
-	"image"
-	"runtime"
-	"sync"
-)
-
-// An InterpolationFunction provides the parameters that describe an
-// interpolation kernel. It returns the number of samples to take
-// and the kernel function to use for sampling.
-type InterpolationFunction int
-
-// InterpolationFunction constants
-const (
-	// Nearest-neighbor interpolation
-	NearestNeighbor InterpolationFunction = iota
-	// Bilinear interpolation
-	Bilinear
-	// Bicubic interpolation (with cubic hermite spline)
-	Bicubic
-	// Mitchell-Netravali interpolation
-	MitchellNetravali
-	// Lanczos interpolation (a=2)
-	Lanczos2
-	// Lanczos interpolation (a=3)
-	Lanczos3
-)
-
-// kernal, returns an InterpolationFunctions taps and kernel.
-func (i InterpolationFunction) kernel() (int, func(float64) float64) {
-	switch i {
-	case Bilinear:
-		return 2, linear
-	case Bicubic:
-		return 4, cubic
-	case MitchellNetravali:
-		return 4, mitchellnetravali
-	case Lanczos2:
-		return 4, lanczos2
-	case Lanczos3:
-		return 6, lanczos3
-	default:
-		// Default to NearestNeighbor.
-		return 2, nearest
-	}
-}
-
-// values <1 will sharpen the image
-var blur = 1.0
-
-// Resize scales an image to new width and height using the interpolation function interp.
-// A new image with the given dimensions will be returned.
-// If one of the parameters width or height is set to 0, its size will be calculated so that
-// the aspect ratio is that of the originating image.
-// The resizing algorithm uses channels for parallel computation.
-// If the input image has width or height of 0, it is returned unchanged.
-func Resize(width, height uint, img image.Image, interp InterpolationFunction) image.Image {
-	scaleX, scaleY := calcFactors(width, height, float64(img.Bounds().Dx()), float64(img.Bounds().Dy()))
-	if width == 0 {
-		width = uint(0.7 + float64(img.Bounds().Dx())/scaleX)
-	}
-	if height == 0 {
-		height = uint(0.7 + float64(img.Bounds().Dy())/scaleY)
-	}
-
-	// Trivial case: return input image
-	if int(width) == img.Bounds().Dx() && int(height) == img.Bounds().Dy() {
-		return img
-	}
-
-	// Input image has no pixels
-	if img.Bounds().Dx() <= 0 || img.Bounds().Dy() <= 0 {
-		return img
-	}
-
-	if interp == NearestNeighbor {
-		return resizeNearest(width, height, scaleX, scaleY, img, interp)
-	}
-
-	taps, kernel := interp.kernel()
-	cpus := runtime.GOMAXPROCS(0)
-	wg := sync.WaitGroup{}
-
-	// Generic access to image.Image is slow in tight loops.
-	// The optimal access has to be determined from the concrete image type.
-	switch input := img.(type) {
-	case *image.RGBA:
-		// 8-bit precision
-		temp := image.NewRGBA(image.Rect(0, 0, input.Bounds().Dy(), int(width)))
-		result := image.NewRGBA(image.Rect(0, 0, int(width), int(height)))
-
-		// horizontal filter, results in transposed temporary image
-		coeffs, offset, filterLength := createWeights8(temp.Bounds().Dy(), taps, blur, scaleX, kernel)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(temp, i, cpus).(*image.RGBA)
-			go func() {
-				defer wg.Done()
-				resizeRGBA(input, slice, scaleX, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-
-		// horizontal filter on transposed image, result is not transposed
-		coeffs, offset, filterLength = createWeights8(result.Bounds().Dy(), taps, blur, scaleY, kernel)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(result, i, cpus).(*image.RGBA)
-			go func() {
-				defer wg.Done()
-				resizeRGBA(temp, slice, scaleY, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-		return result
-	case *image.NRGBA:
-		// 8-bit precision
-		temp := image.NewRGBA(image.Rect(0, 0, input.Bounds().Dy(), int(width)))
-		result := image.NewRGBA(image.Rect(0, 0, int(width), int(height)))
-
-		// horizontal filter, results in transposed temporary image
-		coeffs, offset, filterLength := createWeights8(temp.Bounds().Dy(), taps, blur, scaleX, kernel)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(temp, i, cpus).(*image.RGBA)
-			go func() {
-				defer wg.Done()
-				resizeNRGBA(input, slice, scaleX, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-
-		// horizontal filter on transposed image, result is not transposed
-		coeffs, offset, filterLength = createWeights8(result.Bounds().Dy(), taps, blur, scaleY, kernel)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(result, i, cpus).(*image.RGBA)
-			go func() {
-				defer wg.Done()
-				resizeRGBA(temp, slice, scaleY, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-		return result
-
-	case *image.YCbCr:
-		// 8-bit precision
-		// accessing the YCbCr arrays in a tight loop is slow.
-		// converting the image to ycc increases performance by 2x.
-		temp := newYCC(image.Rect(0, 0, input.Bounds().Dy(), int(width)), input.SubsampleRatio)
-		result := newYCC(image.Rect(0, 0, int(width), int(height)), image.YCbCrSubsampleRatio444)
-
-		coeffs, offset, filterLength := createWeights8(temp.Bounds().Dy(), taps, blur, scaleX, kernel)
-		in := imageYCbCrToYCC(input)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(temp, i, cpus).(*ycc)
-			go func() {
-				defer wg.Done()
-				resizeYCbCr(in, slice, scaleX, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-
-		coeffs, offset, filterLength = createWeights8(result.Bounds().Dy(), taps, blur, scaleY, kernel)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(result, i, cpus).(*ycc)
-			go func() {
-				defer wg.Done()
-				resizeYCbCr(temp, slice, scaleY, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-		return result.YCbCr()
-	case *image.RGBA64:
-		// 16-bit precision
-		temp := image.NewRGBA64(image.Rect(0, 0, input.Bounds().Dy(), int(width)))
-		result := image.NewRGBA64(image.Rect(0, 0, int(width), int(height)))
-
-		// horizontal filter, results in transposed temporary image
-		coeffs, offset, filterLength := createWeights16(temp.Bounds().Dy(), taps, blur, scaleX, kernel)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(temp, i, cpus).(*image.RGBA64)
-			go func() {
-				defer wg.Done()
-				resizeRGBA64(input, slice, scaleX, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-
-		// horizontal filter on transposed image, result is not transposed
-		coeffs, offset, filterLength = createWeights16(result.Bounds().Dy(), taps, blur, scaleY, kernel)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(result, i, cpus).(*image.RGBA64)
-			go func() {
-				defer wg.Done()
-				resizeRGBA64(temp, slice, scaleY, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-		return result
-	case *image.NRGBA64:
-		// 16-bit precision
-		temp := image.NewRGBA64(image.Rect(0, 0, input.Bounds().Dy(), int(width)))
-		result := image.NewRGBA64(image.Rect(0, 0, int(width), int(height)))
-
-		// horizontal filter, results in transposed temporary image
-		coeffs, offset, filterLength := createWeights16(temp.Bounds().Dy(), taps, blur, scaleX, kernel)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(temp, i, cpus).(*image.RGBA64)
-			go func() {
-				defer wg.Done()
-				resizeNRGBA64(input, slice, scaleX, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-
-		// horizontal filter on transposed image, result is not transposed
-		coeffs, offset, filterLength = createWeights16(result.Bounds().Dy(), taps, blur, scaleY, kernel)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(result, i, cpus).(*image.RGBA64)
-			go func() {
-				defer wg.Done()
-				resizeRGBA64(temp, slice, scaleY, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-		return result
-	case *image.Gray:
-		// 8-bit precision
-		temp := image.NewGray(image.Rect(0, 0, input.Bounds().Dy(), int(width)))
-		result := image.NewGray(image.Rect(0, 0, int(width), int(height)))
-
-		// horizontal filter, results in transposed temporary image
-		coeffs, offset, filterLength := createWeights8(temp.Bounds().Dy(), taps, blur, scaleX, kernel)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(temp, i, cpus).(*image.Gray)
-			go func() {
-				defer wg.Done()
-				resizeGray(input, slice, scaleX, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-
-		// horizontal filter on transposed image, result is not transposed
-		coeffs, offset, filterLength = createWeights8(result.Bounds().Dy(), taps, blur, scaleY, kernel)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(result, i, cpus).(*image.Gray)
-			go func() {
-				defer wg.Done()
-				resizeGray(temp, slice, scaleY, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-		return result
-	case *image.Gray16:
-		// 16-bit precision
-		temp := image.NewGray16(image.Rect(0, 0, input.Bounds().Dy(), int(width)))
-		result := image.NewGray16(image.Rect(0, 0, int(width), int(height)))
-
-		// horizontal filter, results in transposed temporary image
-		coeffs, offset, filterLength := createWeights16(temp.Bounds().Dy(), taps, blur, scaleX, kernel)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(temp, i, cpus).(*image.Gray16)
-			go func() {
-				defer wg.Done()
-				resizeGray16(input, slice, scaleX, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-
-		// horizontal filter on transposed image, result is not transposed
-		coeffs, offset, filterLength = createWeights16(result.Bounds().Dy(), taps, blur, scaleY, kernel)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(result, i, cpus).(*image.Gray16)
-			go func() {
-				defer wg.Done()
-				resizeGray16(temp, slice, scaleY, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-		return result
-	default:
-		// 16-bit precision
-		temp := image.NewRGBA64(image.Rect(0, 0, img.Bounds().Dy(), int(width)))
-		result := image.NewRGBA64(image.Rect(0, 0, int(width), int(height)))
-
-		// horizontal filter, results in transposed temporary image
-		coeffs, offset, filterLength := createWeights16(temp.Bounds().Dy(), taps, blur, scaleX, kernel)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(temp, i, cpus).(*image.RGBA64)
-			go func() {
-				defer wg.Done()
-				resizeGeneric(img, slice, scaleX, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-
-		// horizontal filter on transposed image, result is not transposed
-		coeffs, offset, filterLength = createWeights16(result.Bounds().Dy(), taps, blur, scaleY, kernel)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(result, i, cpus).(*image.RGBA64)
-			go func() {
-				defer wg.Done()
-				resizeRGBA64(temp, slice, scaleY, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-		return result
-	}
-}
-
-func resizeNearest(width, height uint, scaleX, scaleY float64, img image.Image, interp InterpolationFunction) image.Image {
-	taps, _ := interp.kernel()
-	cpus := runtime.GOMAXPROCS(0)
-	wg := sync.WaitGroup{}
-
-	switch input := img.(type) {
-	case *image.RGBA:
-		// 8-bit precision
-		temp := image.NewRGBA(image.Rect(0, 0, input.Bounds().Dy(), int(width)))
-		result := image.NewRGBA(image.Rect(0, 0, int(width), int(height)))
-
-		// horizontal filter, results in transposed temporary image
-		coeffs, offset, filterLength := createWeightsNearest(temp.Bounds().Dy(), taps, blur, scaleX)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(temp, i, cpus).(*image.RGBA)
-			go func() {
-				defer wg.Done()
-				nearestRGBA(input, slice, scaleX, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-
-		// horizontal filter on transposed image, result is not transposed
-		coeffs, offset, filterLength = createWeightsNearest(result.Bounds().Dy(), taps, blur, scaleY)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(result, i, cpus).(*image.RGBA)
-			go func() {
-				defer wg.Done()
-				nearestRGBA(temp, slice, scaleY, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-		return result
-	case *image.NRGBA:
-		// 8-bit precision
-		temp := image.NewNRGBA(image.Rect(0, 0, input.Bounds().Dy(), int(width)))
-		result := image.NewNRGBA(image.Rect(0, 0, int(width), int(height)))
-
-		// horizontal filter, results in transposed temporary image
-		coeffs, offset, filterLength := createWeightsNearest(temp.Bounds().Dy(), taps, blur, scaleX)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(temp, i, cpus).(*image.NRGBA)
-			go func() {
-				defer wg.Done()
-				nearestNRGBA(input, slice, scaleX, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-
-		// horizontal filter on transposed image, result is not transposed
-		coeffs, offset, filterLength = createWeightsNearest(result.Bounds().Dy(), taps, blur, scaleY)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(result, i, cpus).(*image.NRGBA)
-			go func() {
-				defer wg.Done()
-				nearestNRGBA(temp, slice, scaleY, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-		return result
-	case *image.YCbCr:
-		// 8-bit precision
-		// accessing the YCbCr arrays in a tight loop is slow.
-		// converting the image to ycc increases performance by 2x.
-		temp := newYCC(image.Rect(0, 0, input.Bounds().Dy(), int(width)), input.SubsampleRatio)
-		result := newYCC(image.Rect(0, 0, int(width), int(height)), image.YCbCrSubsampleRatio444)
-
-		coeffs, offset, filterLength := createWeightsNearest(temp.Bounds().Dy(), taps, blur, scaleX)
-		in := imageYCbCrToYCC(input)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(temp, i, cpus).(*ycc)
-			go func() {
-				defer wg.Done()
-				nearestYCbCr(in, slice, scaleX, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-
-		coeffs, offset, filterLength = createWeightsNearest(result.Bounds().Dy(), taps, blur, scaleY)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(result, i, cpus).(*ycc)
-			go func() {
-				defer wg.Done()
-				nearestYCbCr(temp, slice, scaleY, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-		return result.YCbCr()
-	case *image.RGBA64:
-		// 16-bit precision
-		temp := image.NewRGBA64(image.Rect(0, 0, input.Bounds().Dy(), int(width)))
-		result := image.NewRGBA64(image.Rect(0, 0, int(width), int(height)))
-
-		// horizontal filter, results in transposed temporary image
-		coeffs, offset, filterLength := createWeightsNearest(temp.Bounds().Dy(), taps, blur, scaleX)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(temp, i, cpus).(*image.RGBA64)
-			go func() {
-				defer wg.Done()
-				nearestRGBA64(input, slice, scaleX, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-
-		// horizontal filter on transposed image, result is not transposed
-		coeffs, offset, filterLength = createWeightsNearest(result.Bounds().Dy(), taps, blur, scaleY)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(result, i, cpus).(*image.RGBA64)
-			go func() {
-				defer wg.Done()
-				nearestRGBA64(temp, slice, scaleY, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-		return result
-	case *image.NRGBA64:
-		// 16-bit precision
-		temp := image.NewNRGBA64(image.Rect(0, 0, input.Bounds().Dy(), int(width)))
-		result := image.NewNRGBA64(image.Rect(0, 0, int(width), int(height)))
-
-		// horizontal filter, results in transposed temporary image
-		coeffs, offset, filterLength := createWeightsNearest(temp.Bounds().Dy(), taps, blur, scaleX)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(temp, i, cpus).(*image.NRGBA64)
-			go func() {
-				defer wg.Done()
-				nearestNRGBA64(input, slice, scaleX, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-
-		// horizontal filter on transposed image, result is not transposed
-		coeffs, offset, filterLength = createWeightsNearest(result.Bounds().Dy(), taps, blur, scaleY)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(result, i, cpus).(*image.NRGBA64)
-			go func() {
-				defer wg.Done()
-				nearestNRGBA64(temp, slice, scaleY, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-		return result
-	case *image.Gray:
-		// 8-bit precision
-		temp := image.NewGray(image.Rect(0, 0, input.Bounds().Dy(), int(width)))
-		result := image.NewGray(image.Rect(0, 0, int(width), int(height)))
-
-		// horizontal filter, results in transposed temporary image
-		coeffs, offset, filterLength := createWeightsNearest(temp.Bounds().Dy(), taps, blur, scaleX)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(temp, i, cpus).(*image.Gray)
-			go func() {
-				defer wg.Done()
-				nearestGray(input, slice, scaleX, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-
-		// horizontal filter on transposed image, result is not transposed
-		coeffs, offset, filterLength = createWeightsNearest(result.Bounds().Dy(), taps, blur, scaleY)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(result, i, cpus).(*image.Gray)
-			go func() {
-				defer wg.Done()
-				nearestGray(temp, slice, scaleY, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-		return result
-	case *image.Gray16:
-		// 16-bit precision
-		temp := image.NewGray16(image.Rect(0, 0, input.Bounds().Dy(), int(width)))
-		result := image.NewGray16(image.Rect(0, 0, int(width), int(height)))
-
-		// horizontal filter, results in transposed temporary image
-		coeffs, offset, filterLength := createWeightsNearest(temp.Bounds().Dy(), taps, blur, scaleX)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(temp, i, cpus).(*image.Gray16)
-			go func() {
-				defer wg.Done()
-				nearestGray16(input, slice, scaleX, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-
-		// horizontal filter on transposed image, result is not transposed
-		coeffs, offset, filterLength = createWeightsNearest(result.Bounds().Dy(), taps, blur, scaleY)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(result, i, cpus).(*image.Gray16)
-			go func() {
-				defer wg.Done()
-				nearestGray16(temp, slice, scaleY, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-		return result
-	default:
-		// 16-bit precision
-		temp := image.NewRGBA64(image.Rect(0, 0, img.Bounds().Dy(), int(width)))
-		result := image.NewRGBA64(image.Rect(0, 0, int(width), int(height)))
-
-		// horizontal filter, results in transposed temporary image
-		coeffs, offset, filterLength := createWeightsNearest(temp.Bounds().Dy(), taps, blur, scaleX)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(temp, i, cpus).(*image.RGBA64)
-			go func() {
-				defer wg.Done()
-				nearestGeneric(img, slice, scaleX, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-
-		// horizontal filter on transposed image, result is not transposed
-		coeffs, offset, filterLength = createWeightsNearest(result.Bounds().Dy(), taps, blur, scaleY)
-		wg.Add(cpus)
-		for i := 0; i < cpus; i++ {
-			slice := makeSlice(result, i, cpus).(*image.RGBA64)
-			go func() {
-				defer wg.Done()
-				nearestRGBA64(temp, slice, scaleY, coeffs, offset, filterLength)
-			}()
-		}
-		wg.Wait()
-		return result
-	}
-
-}
-
-// Calculates scaling factors using old and new image dimensions.
-func calcFactors(width, height uint, oldWidth, oldHeight float64) (scaleX, scaleY float64) {
-	if width == 0 {
-		if height == 0 {
-			scaleX = 1.0
-			scaleY = 1.0
-		} else {
-			scaleY = oldHeight / float64(height)
-			scaleX = scaleY
-		}
-	} else {
-		scaleX = oldWidth / float64(width)
-		if height == 0 {
-			scaleY = scaleX
-		} else {
-			scaleY = oldHeight / float64(height)
-		}
-	}
-	return
-}
-
-type imageWithSubImage interface {
-	image.Image
-	SubImage(image.Rectangle) image.Image
-}
-
-func makeSlice(img imageWithSubImage, i, n int) image.Image {
-	return img.SubImage(image.Rect(img.Bounds().Min.X, img.Bounds().Min.Y+i*img.Bounds().Dy()/n, img.Bounds().Max.X, img.Bounds().Min.Y+(i+1)*img.Bounds().Dy()/n))
-}
diff --git a/vendor/github.com/nfnt/resize/thumbnail.go b/vendor/github.com/nfnt/resize/thumbnail.go
deleted file mode 100644
index 9efc246bee..0000000000
--- a/vendor/github.com/nfnt/resize/thumbnail.go
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
-Copyright (c) 2012, Jan Schlicht <jan.schlicht@gmail.com>
-
-Permission to use, copy, modify, and/or distribute this software for any purpose
-with or without fee is hereby granted, provided that the above copyright notice
-and this permission notice appear in all copies.
-
-THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
-REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
-FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
-INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
-OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
-TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
-THIS SOFTWARE.
-*/
-
-package resize
-
-import (
-	"image"
-)
-
-// Thumbnail will downscale provided image to max width and height preserving
-// original aspect ratio and using the interpolation function interp.
-// It will return original image, without processing it, if original sizes
-// are already smaller than provided constraints.
-func Thumbnail(maxWidth, maxHeight uint, img image.Image, interp InterpolationFunction) image.Image {
-	origBounds := img.Bounds()
-	origWidth := uint(origBounds.Dx())
-	origHeight := uint(origBounds.Dy())
-	newWidth, newHeight := origWidth, origHeight
-
-	// Return original image if it have same or smaller size as constraints
-	if maxWidth >= origWidth && maxHeight >= origHeight {
-		return img
-	}
-
-	// Preserve aspect ratio
-	if origWidth > maxWidth {
-		newHeight = uint(origHeight * maxWidth / origWidth)
-		if newHeight < 1 {
-			newHeight = 1
-		}
-		newWidth = maxWidth
-	}
-
-	if newHeight > maxHeight {
-		newWidth = uint(newWidth * maxHeight / newHeight)
-		if newWidth < 1 {
-			newWidth = 1
-		}
-		newHeight = maxHeight
-	}
-	return Resize(newWidth, newHeight, img, interp)
-}
diff --git a/vendor/github.com/nfnt/resize/ycc.go b/vendor/github.com/nfnt/resize/ycc.go
deleted file mode 100644
index 143e4d06ac..0000000000
--- a/vendor/github.com/nfnt/resize/ycc.go
+++ /dev/null
@@ -1,387 +0,0 @@
-/*
-Copyright (c) 2014, Charlie Vieth <charlie.vieth@gmail.com>
-
-Permission to use, copy, modify, and/or distribute this software for any purpose
-with or without fee is hereby granted, provided that the above copyright notice
-and this permission notice appear in all copies.
-
-THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
-REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
-FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
-INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
-OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
-TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
-THIS SOFTWARE.
-*/
-
-package resize
-
-import (
-	"image"
-	"image/color"
-)
-
-// ycc is an in memory YCbCr image.  The Y, Cb and Cr samples are held in a
-// single slice to increase resizing performance.
-type ycc struct {
-	// Pix holds the image's pixels, in Y, Cb, Cr order. The pixel at
-	// (x, y) starts at Pix[(y-Rect.Min.Y)*Stride + (x-Rect.Min.X)*3].
-	Pix []uint8
-	// Stride is the Pix stride (in bytes) between vertically adjacent pixels.
-	Stride int
-	// Rect is the image's bounds.
-	Rect image.Rectangle
-	// SubsampleRatio is the subsample ratio of the original YCbCr image.
-	SubsampleRatio image.YCbCrSubsampleRatio
-}
-
-// PixOffset returns the index of the first element of Pix that corresponds to
-// the pixel at (x, y).
-func (p *ycc) PixOffset(x, y int) int {
-	return (y-p.Rect.Min.Y)*p.Stride + (x-p.Rect.Min.X)*3
-}
-
-func (p *ycc) Bounds() image.Rectangle {
-	return p.Rect
-}
-
-func (p *ycc) ColorModel() color.Model {
-	return color.YCbCrModel
-}
-
-func (p *ycc) At(x, y int) color.Color {
-	if !(image.Point{x, y}.In(p.Rect)) {
-		return color.YCbCr{}
-	}
-	i := p.PixOffset(x, y)
-	return color.YCbCr{
-		p.Pix[i+0],
-		p.Pix[i+1],
-		p.Pix[i+2],
-	}
-}
-
-func (p *ycc) Opaque() bool {
-	return true
-}
-
-// SubImage returns an image representing the portion of the image p visible
-// through r. The returned value shares pixels with the original image.
-func (p *ycc) SubImage(r image.Rectangle) image.Image {
-	r = r.Intersect(p.Rect)
-	if r.Empty() {
-		return &ycc{SubsampleRatio: p.SubsampleRatio}
-	}
-	i := p.PixOffset(r.Min.X, r.Min.Y)
-	return &ycc{
-		Pix:            p.Pix[i:],
-		Stride:         p.Stride,
-		Rect:           r,
-		SubsampleRatio: p.SubsampleRatio,
-	}
-}
-
-// newYCC returns a new ycc with the given bounds and subsample ratio.
-func newYCC(r image.Rectangle, s image.YCbCrSubsampleRatio) *ycc {
-	w, h := r.Dx(), r.Dy()
-	buf := make([]uint8, 3*w*h)
-	return &ycc{Pix: buf, Stride: 3 * w, Rect: r, SubsampleRatio: s}
-}
-
-// Copy of image.YCbCrSubsampleRatio constants - this allows us to support
-// older versions of Go where these constants are not defined (i.e. Go 1.4)
-const (
-	ycbcrSubsampleRatio444 image.YCbCrSubsampleRatio = iota
-	ycbcrSubsampleRatio422
-	ycbcrSubsampleRatio420
-	ycbcrSubsampleRatio440
-	ycbcrSubsampleRatio411
-	ycbcrSubsampleRatio410
-)
-
-// YCbCr converts ycc to a YCbCr image with the same subsample ratio
-// as the YCbCr image that ycc was generated from.
-func (p *ycc) YCbCr() *image.YCbCr {
-	ycbcr := image.NewYCbCr(p.Rect, p.SubsampleRatio)
-	switch ycbcr.SubsampleRatio {
-	case ycbcrSubsampleRatio422:
-		return p.ycbcr422(ycbcr)
-	case ycbcrSubsampleRatio420:
-		return p.ycbcr420(ycbcr)
-	case ycbcrSubsampleRatio440:
-		return p.ycbcr440(ycbcr)
-	case ycbcrSubsampleRatio444:
-		return p.ycbcr444(ycbcr)
-	case ycbcrSubsampleRatio411:
-		return p.ycbcr411(ycbcr)
-	case ycbcrSubsampleRatio410:
-		return p.ycbcr410(ycbcr)
-	}
-	return ycbcr
-}
-
-// imageYCbCrToYCC converts a YCbCr image to a ycc image for resizing.
-func imageYCbCrToYCC(in *image.YCbCr) *ycc {
-	w, h := in.Rect.Dx(), in.Rect.Dy()
-	p := ycc{
-		Pix:            make([]uint8, 3*w*h),
-		Stride:         3 * w,
-		Rect:           image.Rect(0, 0, w, h),
-		SubsampleRatio: in.SubsampleRatio,
-	}
-	switch in.SubsampleRatio {
-	case ycbcrSubsampleRatio422:
-		return convertToYCC422(in, &p)
-	case ycbcrSubsampleRatio420:
-		return convertToYCC420(in, &p)
-	case ycbcrSubsampleRatio440:
-		return convertToYCC440(in, &p)
-	case ycbcrSubsampleRatio444:
-		return convertToYCC444(in, &p)
-	case ycbcrSubsampleRatio411:
-		return convertToYCC411(in, &p)
-	case ycbcrSubsampleRatio410:
-		return convertToYCC410(in, &p)
-	}
-	return &p
-}
-
-func (p *ycc) ycbcr422(ycbcr *image.YCbCr) *image.YCbCr {
-	var off int
-	Pix := p.Pix
-	Y := ycbcr.Y
-	Cb := ycbcr.Cb
-	Cr := ycbcr.Cr
-	for y := 0; y < ycbcr.Rect.Max.Y-ycbcr.Rect.Min.Y; y++ {
-		yy := y * ycbcr.YStride
-		cy := y * ycbcr.CStride
-		for x := 0; x < ycbcr.Rect.Max.X-ycbcr.Rect.Min.X; x++ {
-			ci := cy + x/2
-			Y[yy+x] = Pix[off+0]
-			Cb[ci] = Pix[off+1]
-			Cr[ci] = Pix[off+2]
-			off += 3
-		}
-	}
-	return ycbcr
-}
-
-func (p *ycc) ycbcr420(ycbcr *image.YCbCr) *image.YCbCr {
-	var off int
-	Pix := p.Pix
-	Y := ycbcr.Y
-	Cb := ycbcr.Cb
-	Cr := ycbcr.Cr
-	for y := 0; y < ycbcr.Rect.Max.Y-ycbcr.Rect.Min.Y; y++ {
-		yy := y * ycbcr.YStride
-		cy := (y / 2) * ycbcr.CStride
-		for x := 0; x < ycbcr.Rect.Max.X-ycbcr.Rect.Min.X; x++ {
-			ci := cy + x/2
-			Y[yy+x] = Pix[off+0]
-			Cb[ci] = Pix[off+1]
-			Cr[ci] = Pix[off+2]
-			off += 3
-		}
-	}
-	return ycbcr
-}
-
-func (p *ycc) ycbcr440(ycbcr *image.YCbCr) *image.YCbCr {
-	var off int
-	Pix := p.Pix
-	Y := ycbcr.Y
-	Cb := ycbcr.Cb
-	Cr := ycbcr.Cr
-	for y := 0; y < ycbcr.Rect.Max.Y-ycbcr.Rect.Min.Y; y++ {
-		yy := y * ycbcr.YStride
-		cy := (y / 2) * ycbcr.CStride
-		for x := 0; x < ycbcr.Rect.Max.X-ycbcr.Rect.Min.X; x++ {
-			ci := cy + x
-			Y[yy+x] = Pix[off+0]
-			Cb[ci] = Pix[off+1]
-			Cr[ci] = Pix[off+2]
-			off += 3
-		}
-	}
-	return ycbcr
-}
-
-func (p *ycc) ycbcr444(ycbcr *image.YCbCr) *image.YCbCr {
-	var off int
-	Pix := p.Pix
-	Y := ycbcr.Y
-	Cb := ycbcr.Cb
-	Cr := ycbcr.Cr
-	for y := 0; y < ycbcr.Rect.Max.Y-ycbcr.Rect.Min.Y; y++ {
-		yy := y * ycbcr.YStride
-		cy := y * ycbcr.CStride
-		for x := 0; x < ycbcr.Rect.Max.X-ycbcr.Rect.Min.X; x++ {
-			ci := cy + x
-			Y[yy+x] = Pix[off+0]
-			Cb[ci] = Pix[off+1]
-			Cr[ci] = Pix[off+2]
-			off += 3
-		}
-	}
-	return ycbcr
-}
-
-func (p *ycc) ycbcr411(ycbcr *image.YCbCr) *image.YCbCr {
-	var off int
-	Pix := p.Pix
-	Y := ycbcr.Y
-	Cb := ycbcr.Cb
-	Cr := ycbcr.Cr
-	for y := 0; y < ycbcr.Rect.Max.Y-ycbcr.Rect.Min.Y; y++ {
-		yy := y * ycbcr.YStride
-		cy := y * ycbcr.CStride
-		for x := 0; x < ycbcr.Rect.Max.X-ycbcr.Rect.Min.X; x++ {
-			ci := cy + x/4
-			Y[yy+x] = Pix[off+0]
-			Cb[ci] = Pix[off+1]
-			Cr[ci] = Pix[off+2]
-			off += 3
-		}
-	}
-	return ycbcr
-}
-
-func (p *ycc) ycbcr410(ycbcr *image.YCbCr) *image.YCbCr {
-	var off int
-	Pix := p.Pix
-	Y := ycbcr.Y
-	Cb := ycbcr.Cb
-	Cr := ycbcr.Cr
-	for y := 0; y < ycbcr.Rect.Max.Y-ycbcr.Rect.Min.Y; y++ {
-		yy := y * ycbcr.YStride
-		cy := (y / 2) * ycbcr.CStride
-		for x := 0; x < ycbcr.Rect.Max.X-ycbcr.Rect.Min.X; x++ {
-			ci := cy + x/4
-			Y[yy+x] = Pix[off+0]
-			Cb[ci] = Pix[off+1]
-			Cr[ci] = Pix[off+2]
-			off += 3
-		}
-	}
-	return ycbcr
-}
-
-func convertToYCC422(in *image.YCbCr, p *ycc) *ycc {
-	var off int
-	Pix := p.Pix
-	Y := in.Y
-	Cb := in.Cb
-	Cr := in.Cr
-	for y := 0; y < in.Rect.Max.Y-in.Rect.Min.Y; y++ {
-		yy := y * in.YStride
-		cy := y * in.CStride
-		for x := 0; x < in.Rect.Max.X-in.Rect.Min.X; x++ {
-			ci := cy + x/2
-			Pix[off+0] = Y[yy+x]
-			Pix[off+1] = Cb[ci]
-			Pix[off+2] = Cr[ci]
-			off += 3
-		}
-	}
-	return p
-}
-
-func convertToYCC420(in *image.YCbCr, p *ycc) *ycc {
-	var off int
-	Pix := p.Pix
-	Y := in.Y
-	Cb := in.Cb
-	Cr := in.Cr
-	for y := 0; y < in.Rect.Max.Y-in.Rect.Min.Y; y++ {
-		yy := y * in.YStride
-		cy := (y / 2) * in.CStride
-		for x := 0; x < in.Rect.Max.X-in.Rect.Min.X; x++ {
-			ci := cy + x/2
-			Pix[off+0] = Y[yy+x]
-			Pix[off+1] = Cb[ci]
-			Pix[off+2] = Cr[ci]
-			off += 3
-		}
-	}
-	return p
-}
-
-func convertToYCC440(in *image.YCbCr, p *ycc) *ycc {
-	var off int
-	Pix := p.Pix
-	Y := in.Y
-	Cb := in.Cb
-	Cr := in.Cr
-	for y := 0; y < in.Rect.Max.Y-in.Rect.Min.Y; y++ {
-		yy := y * in.YStride
-		cy := (y / 2) * in.CStride
-		for x := 0; x < in.Rect.Max.X-in.Rect.Min.X; x++ {
-			ci := cy + x
-			Pix[off+0] = Y[yy+x]
-			Pix[off+1] = Cb[ci]
-			Pix[off+2] = Cr[ci]
-			off += 3
-		}
-	}
-	return p
-}
-
-func convertToYCC444(in *image.YCbCr, p *ycc) *ycc {
-	var off int
-	Pix := p.Pix
-	Y := in.Y
-	Cb := in.Cb
-	Cr := in.Cr
-	for y := 0; y < in.Rect.Max.Y-in.Rect.Min.Y; y++ {
-		yy := y * in.YStride
-		cy := y * in.CStride
-		for x := 0; x < in.Rect.Max.X-in.Rect.Min.X; x++ {
-			ci := cy + x
-			Pix[off+0] = Y[yy+x]
-			Pix[off+1] = Cb[ci]
-			Pix[off+2] = Cr[ci]
-			off += 3
-		}
-	}
-	return p
-}
-
-func convertToYCC411(in *image.YCbCr, p *ycc) *ycc {
-	var off int
-	Pix := p.Pix
-	Y := in.Y
-	Cb := in.Cb
-	Cr := in.Cr
-	for y := 0; y < in.Rect.Max.Y-in.Rect.Min.Y; y++ {
-		yy := y * in.YStride
-		cy := y * in.CStride
-		for x := 0; x < in.Rect.Max.X-in.Rect.Min.X; x++ {
-			ci := cy + x/4
-			Pix[off+0] = Y[yy+x]
-			Pix[off+1] = Cb[ci]
-			Pix[off+2] = Cr[ci]
-			off += 3
-		}
-	}
-	return p
-}
-
-func convertToYCC410(in *image.YCbCr, p *ycc) *ycc {
-	var off int
-	Pix := p.Pix
-	Y := in.Y
-	Cb := in.Cb
-	Cr := in.Cr
-	for y := 0; y < in.Rect.Max.Y-in.Rect.Min.Y; y++ {
-		yy := y * in.YStride
-		cy := (y / 2) * in.CStride
-		for x := 0; x < in.Rect.Max.X-in.Rect.Min.X; x++ {
-			ci := cy + x/4
-			Pix[off+0] = Y[yy+x]
-			Pix[off+1] = Cb[ci]
-			Pix[off+2] = Cr[ci]
-			off += 3
-		}
-	}
-	return p
-}