Merge https://github.com/cocos2d/cocos2d-html5 into webgl20

Merge https://github.com/cocos2d/cocos2d-html5

Merge pull request cocos2d#584 from dingpinglv/iss1509_UpdateMenuTest

fixed cocos2d#1509 correct bug of cc.Follow

Merge pull request cocos2d#522 from linshun/iss1446_v2.0

issue cocos2d#1446: fixed v2.0 version

Merge pull request cocos2d#400 from dingpinglv/iss1339_ImproveTemplate

fixed cocos2d#1339 Improve template for version release

Merge pull request cocos2d#300 from linshun/iss1234_AlphaVersion

Add super init and fixed index note for alpha version