Feature #5950 change Facebook dialog  API
Merge pull request #2362 from wuzhiming/developing

Feature #5950 change Facebook dialog  API
Merge branches 'Renderer' and 'develop' of git://github.com/cocos2d/cocos2d-html5 into Renderer
Fixed #5990: Improve Facebook SDK
Merge pull request #2368 from pandamicro/Renderer

Improve Facebook SDK