Merge pull request #1553 from pandamicro/develop-3.0

Refactor #3922: Refactor basic getter/setter of CCSprite, CCTexture2D, CCLayer,
Merge branch 'develop-3.0' of https://github.com/cocos2d/cocos2d-html5 into develop-3.0

# Via dingpinglv
* 'develop-3.0' of https://github.com/cocos2d/cocos2d-html5: