Merge pull request cocos2d#1880 from VisualSJ/develop-5-26

Add engine version

Author: dingpinglv

cocos2d/core/platform/CCConfig.js

@@ -33,7 +33,7 @@
  * @constant
  * @type String
  */
-cc.ENGINE_VERSION = "Cocos2d-html5-v3.0 beta";
+window["CocosEngine"] = cc.ENGINE_VERSION = "Cocos2d-html5-v3.0 beta";
 
 /**
  * <p>