Refactor #4365: Bind layers' constructors with init functionality in JSB
Refactor #4365: Bind sprite constructors with init functionality in JSB
Refactor #4365: Make sprite extend test compatible in both JSB and Web
Merge branch 'master' of https://github.com/cocos2d/cocos2d-js
Merge branch 'master' of https://github.com/cocos2d/cocos2d-js
Merge pull request #132 from pandamicro/master

Refactor #4365: Bind layers' and sprites constructors with init functionality in JSB