Fix #88 PropTypes deprecation warning (#92)

* Fix #88 PropTypes deprecation warning

* move prop-types to devDependency

Author: yuchuan1

package.json

@@ -99,6 +99,7 @@
     "url-loader": "^0.5.7",
     "webpack": "^1.13.3",
     "webpack-dev-middleware": "^1.8.4",
-    "webpack-hot-middleware": "^2.13.2"
+    "webpack-hot-middleware": "^2.13.2",
+     "prop-types": "^15.5.10"
   }
 }

src/DefaultPlayer/DefaultPlayer.js

@@ -1,4 +1,5 @@
-import React, { PropTypes } from 'react';
+import React from 'react';
+import PropTypes from 'prop-types';
 import videoConnect from './../video/video';
 import copy from './copy';
 import {