Issue #4580: Make Texture2d constants values equals to Cocos2d-x
Merge pull request #1726 from dingpinglv/Iss_SyncEventManager

Closed #4597: set doLayout function of ccui to private function
Issue #4589: Make actions extendable directly via ctor pack 1
Merge branch 'develop-3.0' of git://github.com/cocos2d/cocos2d-html5 into develop-3.0
Merge pull request #1727 from pandamicro/develop-3.0

Issue #4589: Make actions extendable directly via ctor pack 1
Fixed #4597: fixed the reference of _doLayout function in UILayout.js
Merge pull request #1728 from dingpinglv/Iss4597_DoLayout

Fixed #4597: fixed the reference of _doLayout function in UILayout.js
Closed #4571: Correct the DrawNode API inconsistence between H5 and JSB
Fixed: sync cc.eventManager to -x and add some jsDoc to the classes of event-manager