update release note of cocos2d-js
Merge branch 'master' of https://github.com/cocos2d/cocos-docs into Iss_EventManagerDoc
Update the release note of Cocos2d-Html5
update release note of Cocos2d-Html5
Merge pull request #199 from dingpinglv/Iss_ReleaseNote

Simplify the release note of Cocos2d-JS