Remove dependency on React internals

Author: tschaub

package.json

@@ -61,8 +61,7 @@
     "classnames": "^2.1.1",
     "immutable": "^3.7.2",
     "moment": "^2.14.1",
-    "moment-range": "^2.0.3",
-    "react-addons-pure-render-mixin": "^0.14.0 || 15.x.x"
+    "moment-range": "^2.0.3"
   },
   "devDependencies": {
     "babel-cli": "^6.14.0",

src/DateRangePicker.jsx

@@ -17,7 +17,7 @@ import isMomentRange from './utils/isMomentRange';
 import hasUpdatedValue from './utils/hasUpdatedValue';
 import { getYearMonth, getYearMonthProps } from './utils/getYearMonth';
 
-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({