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diff --git a/node_modules/base64-js/LICENSE b/node_modules/base64-js/LICENSE
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+++ b/node_modules/base64-js/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2014 Jameson Little
+
+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/node_modules/base64-js/README.md b/node_modules/base64-js/README.md
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--- /dev/null
+++ b/node_modules/base64-js/README.md
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+base64-js
+=========
+
+`base64-js` does basic base64 encoding/decoding in pure JS.
+
+[](http://travis-ci.org/beatgammit/base64-js)
+
+Many browsers already have base64 encoding/decoding functionality, but it is for text data, not all-purpose binary data.
+
+Sometimes encoding/decoding binary data in the browser is useful, and that is what this module does.
+
+## install
+
+With [npm](https://npmjs.org) do:
+
+`npm install base64-js` and `var base64js = require('base64-js')`
+
+For use in web browsers do:
+
+`<script src="base64js.min.js"></script>`
+
+## methods
+
+`base64js` has three exposed functions, `byteLength`, `toByteArray` and `fromByteArray`, which both take a single argument.
+
+* `byteLength` - Takes a base64 string and returns length of byte array
+* `toByteArray` - Takes a base64 string and returns a byte array
+* `fromByteArray` - Takes a byte array and returns a base64 string
+
+## license
+
+MIT
diff --git a/node_modules/base64-js/base64js.min.js b/node_modules/base64-js/base64js.min.js
new file mode 100644
index 0000000..b0279c0
--- /dev/null
+++ b/node_modules/base64-js/base64js.min.js
@@ -0,0 +1 @@
+(function(r){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=r()}else if(typeof define==="function"&&define.amd){define([],r)}else{var e;if(typeof window!=="undefined"){e=window}else if(typeof global!=="undefined"){e=global}else if(typeof self!=="undefined"){e=self}else{e=this}e.base64js=r()}})(function(){var r,e,n;return function(){function d(a,f,i){function u(n,r){if(!f[n]){if(!a[n]){var e="function"==typeof require&&require;if(!r&&e)return e(n,!0);if(v)return v(n,!0);var t=new Error("Cannot find module '"+n+"'");throw t.code="MODULE_NOT_FOUND",t}var o=f[n]={exports:{}};a[n][0].call(o.exports,function(r){var e=a[n][1][r];return u(e||r)},o,o.exports,d,a,f,i)}return f[n].exports}for(var v="function"==typeof require&&require,r=0;r<i.length;r++)u(i[r]);return u}return d}()({"/":[function(r,e,n){"use strict";n.byteLength=f;n.toByteArray=i;n.fromByteArray=p;var u=[];var v=[];var d=typeof Uint8Array!=="undefined"?Uint8Array:Array;var t="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";for(var o=0,a=t.length;o<a;++o){u[o]=t[o];v[t.charCodeAt(o)]=o}v["-".charCodeAt(0)]=62;v["_".charCodeAt(0)]=63;function c(r){var e=r.length;if(e%4>0){throw new Error("Invalid string. Length must be a multiple of 4")}var n=r.indexOf("=");if(n===-1)n=e;var t=n===e?0:4-n%4;return[n,t]}function f(r){var e=c(r);var n=e[0];var t=e[1];return(n+t)*3/4-t}function h(r,e,n){return(e+n)*3/4-n}function i(r){var e;var n=c(r);var t=n[0];var o=n[1];var a=new d(h(r,t,o));var f=0;var i=o>0?t-4:t;var u;for(u=0;u<i;u+=4){e=v[r.charCodeAt(u)]<<18|v[r.charCodeAt(u+1)]<<12|v[r.charCodeAt(u+2)]<<6|v[r.charCodeAt(u+3)];a[f++]=e>>16&255;a[f++]=e>>8&255;a[f++]=e&255}if(o===2){e=v[r.charCodeAt(u)]<<2|v[r.charCodeAt(u+1)]>>4;a[f++]=e&255}if(o===1){e=v[r.charCodeAt(u)]<<10|v[r.charCodeAt(u+1)]<<4|v[r.charCodeAt(u+2)]>>2;a[f++]=e>>8&255;a[f++]=e&255}return a}function s(r){return u[r>>18&63]+u[r>>12&63]+u[r>>6&63]+u[r&63]}function l(r,e,n){var t;var o=[];for(var a=e;a<n;a+=3){t=(r[a]<<16&16711680)+(r[a+1]<<8&65280)+(r[a+2]&255);o.push(s(t))}return o.join("")}function p(r){var e;var n=r.length;var t=n%3;var o=[];var a=16383;for(var f=0,i=n-t;f<i;f+=a){o.push(l(r,f,f+a>i?i:f+a))}if(t===1){e=r[n-1];o.push(u[e>>2]+u[e<<4&63]+"==")}else if(t===2){e=(r[n-2]<<8)+r[n-1];o.push(u[e>>10]+u[e>>4&63]+u[e<<2&63]+"=")}return o.join("")}},{}]},{},[])("/")});
diff --git a/node_modules/base64-js/index.js b/node_modules/base64-js/index.js
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+++ b/node_modules/base64-js/index.js
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+'use strict'
+
+exports.byteLength = byteLength
+exports.toByteArray = toByteArray
+exports.fromByteArray = fromByteArray
+
+var lookup = []
+var revLookup = []
+var Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array
+
+var code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
+for (var i = 0, len = code.length; i < len; ++i) {
+ lookup[i] = code[i]
+ revLookup[code.charCodeAt(i)] = i
+}
+
+// Support decoding URL-safe base64 strings, as Node.js does.
+// See: https://en.wikipedia.org/wiki/Base64#URL_applications
+revLookup['-'.charCodeAt(0)] = 62
+revLookup['_'.charCodeAt(0)] = 63
+
+function getLens (b64) {
+ var len = b64.length
+
+ if (len % 4 > 0) {
+ throw new Error('Invalid string. Length must be a multiple of 4')
+ }
+
+ // Trim off extra bytes after placeholder bytes are found
+ // See: https://github.com/beatgammit/base64-js/issues/42
+ var validLen = b64.indexOf('=')
+ if (validLen === -1) validLen = len
+
+ var placeHoldersLen = validLen === len
+ ? 0
+ : 4 - (validLen % 4)
+
+ return [validLen, placeHoldersLen]
+}
+
+// base64 is 4/3 + up to two characters of the original data
+function byteLength (b64) {
+ var lens = getLens(b64)
+ var validLen = lens[0]
+ var placeHoldersLen = lens[1]
+ return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen
+}
+
+function _byteLength (b64, validLen, placeHoldersLen) {
+ return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen
+}
+
+function toByteArray (b64) {
+ var tmp
+ var lens = getLens(b64)
+ var validLen = lens[0]
+ var placeHoldersLen = lens[1]
+
+ var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen))
+
+ var curByte = 0
+
+ // if there are placeholders, only get up to the last complete 4 chars
+ var len = placeHoldersLen > 0
+ ? validLen - 4
+ : validLen
+
+ var i
+ for (i = 0; i < len; i += 4) {
+ tmp =
+ (revLookup[b64.charCodeAt(i)] << 18) |
+ (revLookup[b64.charCodeAt(i + 1)] << 12) |
+ (revLookup[b64.charCodeAt(i + 2)] << 6) |
+ revLookup[b64.charCodeAt(i + 3)]
+ arr[curByte++] = (tmp >> 16) & 0xFF
+ arr[curByte++] = (tmp >> 8) & 0xFF
+ arr[curByte++] = tmp & 0xFF
+ }
+
+ if (placeHoldersLen === 2) {
+ tmp =
+ (revLookup[b64.charCodeAt(i)] << 2) |
+ (revLookup[b64.charCodeAt(i + 1)] >> 4)
+ arr[curByte++] = tmp & 0xFF
+ }
+
+ if (placeHoldersLen === 1) {
+ tmp =
+ (revLookup[b64.charCodeAt(i)] << 10) |
+ (revLookup[b64.charCodeAt(i + 1)] << 4) |
+ (revLookup[b64.charCodeAt(i + 2)] >> 2)
+ arr[curByte++] = (tmp >> 8) & 0xFF
+ arr[curByte++] = tmp & 0xFF
+ }
+
+ return arr
+}
+
+function tripletToBase64 (num) {
+ return lookup[num >> 18 & 0x3F] +
+ lookup[num >> 12 & 0x3F] +
+ lookup[num >> 6 & 0x3F] +
+ lookup[num & 0x3F]
+}
+
+function encodeChunk (uint8, start, end) {
+ var tmp
+ var output = []
+ for (var i = start; i < end; i += 3) {
+ tmp =
+ ((uint8[i] << 16) & 0xFF0000) +
+ ((uint8[i + 1] << 8) & 0xFF00) +
+ (uint8[i + 2] & 0xFF)
+ output.push(tripletToBase64(tmp))
+ }
+ return output.join('')
+}
+
+function fromByteArray (uint8) {
+ var tmp
+ var len = uint8.length
+ var extraBytes = len % 3 // if we have 1 byte left, pad 2 bytes
+ var parts = []
+ var maxChunkLength = 16383 // must be multiple of 3
+
+ // go through the array every three bytes, we'll deal with trailing stuff later
+ for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {
+ parts.push(encodeChunk(
+ uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)
+ ))
+ }
+
+ // pad the end with zeros, but make sure to not forget the extra bytes
+ if (extraBytes === 1) {
+ tmp = uint8[len - 1]
+ parts.push(
+ lookup[tmp >> 2] +
+ lookup[(tmp << 4) & 0x3F] +
+ '=='
+ )
+ } else if (extraBytes === 2) {
+ tmp = (uint8[len - 2] << 8) + uint8[len - 1]
+ parts.push(
+ lookup[tmp >> 10] +
+ lookup[(tmp >> 4) & 0x3F] +
+ lookup[(tmp << 2) & 0x3F] +
+ '='
+ )
+ }
+
+ return parts.join('')
+}
diff --git a/node_modules/base64-js/package.json b/node_modules/base64-js/package.json
new file mode 100644
index 0000000..4d5c193
--- /dev/null
+++ b/node_modules/base64-js/package.json
@@ -0,0 +1,59 @@
+{
+ "_from": "base64-js@^1.0.2",
+ "_id": "base64-js@1.3.1",
+ "_inBundle": false,
+ "_integrity": "sha512-mLQ4i2QO1ytvGWFWmcngKO//JXAQueZvwEKtjgQFM4jIK0kU+ytMfplL8j+n5mspOfjHwoAg+9yhb7BwAHm36g==",
+ "_location": "/base64-js",
+ "_phantomChildren": {},
+ "_requested": {
+ "type": "range",
+ "registry": true,
+ "raw": "base64-js@^1.0.2",
+ "name": "base64-js",
+ "escapedName": "base64-js",
+ "rawSpec": "^1.0.2",
+ "saveSpec": null,
+ "fetchSpec": "^1.0.2"
+ },
+ "_requiredBy": [
+ "/buffer"
+ ],
+ "_resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.3.1.tgz",
+ "_shasum": "58ece8cb75dd07e71ed08c736abc5fac4dbf8df1",
+ "_spec": "base64-js@^1.0.2",
+ "author": {
+ "name": "T. Jameson Little",
+ "email": "t.jameson.little@gmail.com"
+ },
+ "bugs": {
+ "url": "https://github.com/beatgammit/base64-js/issues"
+ },
+ "bundleDependencies": false,
+ "deprecated": false,
+ "description": "Base64 encoding/decoding in pure JS",
+ "devDependencies": {
+ "benchmark": "^2.1.4",
+ "browserify": "^16.3.0",
+ "standard": "*",
+ "tape": "4.x",
+ "uglify-js": "^3.6.0"
+ },
+ "homepage": "https://github.com/beatgammit/base64-js",
+ "keywords": [
+ "base64"
+ ],
+ "license": "MIT",
+ "main": "index.js",
+ "name": "base64-js",
+ "repository": {
+ "type": "git",
+ "url": "git://github.com/beatgammit/base64-js.git"
+ },
+ "scripts": {
+ "build": "browserify -s base64js -r ./ | uglifyjs -m > base64js.min.js",
+ "lint": "standard",
+ "test": "npm run lint && npm run unit",
+ "unit": "tape test/*.js"
+ },
+ "version": "1.3.1"
+}