Remove dependency on React internals

Author: tschaub

package.json

@@ -50,8 +50,7 @@
     "classnames": "^2.1.1",
     "immutable": "^3.7.2",
     "moment": "^2.10.6",
-    "moment-range": "^2.0.3",
-    "react-addons-pure-render-mixin": "^0.14.0 || 15.x.x"
+    "moment-range": "^2.0.3"
   },
   "devDependencies": {
     "babel": "^5.2.16",

src/DateRangePicker.jsx

@@ -15,7 +15,7 @@ import PaginationArrow from './PaginationArrow';
 
 import isMomentRange from './utils/isMomentRange';
 
-import PureRenderMixin from 'react-addons-pure-render-mixin';
+import PureRenderMixin from './utils/PureRenderMixin';
 
 const absoluteMinimum = moment(new Date(-8640000000000000 / 2)).startOf('day');
 const absoluteMaximum = moment(new Date(8640000000000000 / 2)).startOf('day');

src/Legend.jsx

@@ -2,7 +2,7 @@ import React from 'react';
 
 import BemMixin from './utils/BemMixin';
 
-import PureRenderMixin from 'react-addons-pure-render-mixin';
+import PureRenderMixin from './utils/PureRenderMixin';
 
 
 const Legend = React.createClass({

src/PaginationArrow.jsx

@@ -2,7 +2,7 @@ import React from 'react';
 
 import BemMixin from './utils/BemMixin';
 
-import PureRenderMixin from 'react-addons-pure-render-mixin';
+import PureRenderMixin from './utils/PureRenderMixin';
 
 
 const PaginationArrow = React.createClass({