Refactor #4294 : Fix a bug of config of project to run jsb.
Merge branch 'master' of https://github.com/cocos2d/cocos2d-js
Issue #4277 : Change some apis to private.
Issue #4294 : Add LoaderTest and PathTest into js-tests.
Bind some api about constants into jsb.
Merge pull request #59 from SmallAiTT/master

Issue #4294 : Add LoaderTest and PathTest into js-tests. Bind some api about constants into jsb.