update facebook android doc to 3.0rc3
update notice for version
update version
Merge pull request #476 from pandamicro/master

[Cocos2d-JS] Docs for v3.0 RC3 release
Merge pull request #477 from joshuastray/master

update facebook android doc to 3.0rc3
[Cocos2d-JS] Upgrade Facebook SDK Docs to Beta