[Cocos2d-JS] Docs for 3.1 beta release
Merge branch 'master' of https://github.com/cocos2d/cocos-docs
[Cocos2d-JS] Improve Facebook document
[Cocos2d-JS] Improve Cocos2d-JS 3.1 beta release documents
[Cocos2d-JS] Improve Cocos2d-JS 3.1 beta release documents
[Cocos2d-JS] Improve Facebook SDK Integration docs
[Cocos2d-JS] Improve Cocos2d-JS release notes
[Cocos2d-JS] Improve Workflow with code ide
Merge branch 'master' of https://github.com/cocos2d/cocos-docs

Conflicts:
	manual/framework/cocos2d-js/2-working-environment-and-workflow/2-3-workflow-with-cocos-code-ide/zh.md
	manual/framework/html5/facebook-sdk/facebook-sdk-on-android/en.md
	manual/framework/html5/facebook-sdk/facebook-sdk-on-ios/en.md
	manual/framework/html5/facebook-sdk/facebook-sdk-on-web/en.md
[Cocos2d-JS] Improve Facebook SDK Integration docs
Merge pull request #537 from pandamicro/master

[Cocos2d-JS] Docs for 3.1 beta release