Issue #4589: Fix bugs in Cocos2d-html5 implementation of ctor
Issue #4589: Make actions extendable directly via ctor pack 2
Issue #4589: Make actions extendable directly via ctor pack 3
Fixed #4623: Make cc.textureCache.addImage API more logical
Merge branch 'develop-3.0' of git://github.com/cocos2d/cocos2d-html5 into develop-3.0
Issue #4589: Fix bugs
Merge pull request #1731 from pandamicro/develop-3.0

Fixed #4589: Make actions extendable directly via ctor complete