Refactor #4290: Resolve bug of PhysicsSprite
Merge branch 'master' of https://github.com/cocos2d/cocos2d-js
Issue #4294: Remove cc.c4f, cc.c3b, cc.c4b
Issue #4294: Add clear functions in ccs singletons
Merge branch 'master' of https://github.com/cocos2d/cocos2d-js
Merge pull request #56 from pandamicro/master

Issue #4294: Resolve bugs
Merge pull request #57 from dingpinglv/Iss4277_ReleaseV3.0

Issue #4277: sync file to latest of cocos2d-js-tests
Issue #4277: update reference of submodule 'cocos2d-html5'
Merge branch 'master' of https://github.com/cocos2d/cocos2d-js into Iss4277_ReleaseV3.0