Merge branch 'master' of https://github.com/cocos2d/cocos2d-js
issue #5695: update facebook testcase
use HttpMethod enum instead of int
Fixed #2030: Label text bounding error
Merge pull request #632 from pandamicro/master

Fixed #4735: Made cc.RenderTexture's beginWithClear accept 255 color value
Merge pull request #634 from VisualSJ/master

Fixed #2030: Label text bounding error
Merge pull request #633 from joshuastray/master

issue #5695: update facebook testcase
Update html5 ref
Merge branch 'master' of https://github.com/cocos2d/cocos2d-js