[Cocos2d-JS] Add 3.2 release note
Merge branch 'master' of https://github.com/cocos2d/cocos-docs
[Cocos2d-JS] Fix logo url issue
[Cocos2d-JS] v3.2 Upgrade guide
[Cocos2d-JS] v3.2 release
Merge pull request #668 from pandamicro/master

[Cocos2d-JS] Add 3.2 release note