[Cocos2d-JS] Add Facebook api reference
[Cocos2d-JS] Add Integrate Facebook sdk on android document
[Cocos2d-JS] Add Integrate Facebook sdk on iOS document
Merge branch 'master' of https://github.com/cocos2d/cocos-docs
Merge branch 'master' of https://github.com/cocos2d/cocos-docs
Update format of Facebook API ref
Update format for Facebook API ref
Update en.md
Update format for Facebook API ref
Update format for chinese Facebook API ref
[Cocos2d-JS] Add facebook-sdk web integration doc
[Cocos2d-JS] Update links and informations in Facebook docs
[Cocos2d-JS] Add Facebook docs links to catalog
Merge pull request #439 from pandamicro/master

[Cocos2d-JS] Add Facebook documents