Update link in release note
Merge pull request #298 from pandamicro/master

Update link in release note
Update release note
Merge branch 'master' of https://github.com/cocos2d/cocos2d-js
Merge pull request #299 from pandamicro/master

Update release note
Merge branch 'master' of https://github.com/cocos2d/cocos2d-js into spidermonkey28