Merge pull request #202 from minggo/doc-v3.0

update release note
issue #232, clear the concepts
Merge pull request #203 from andyque/master

issue #232, clear the concepts
Merge pull request #204 from minggo/doc-v3.0

update version requirement of python
Update the version limit of python in cocos-console/en.md
Merge branch 'master' of https://github.com/cocos2d/cocos-docs into Iss_EventManagerDoc
Update the setup step in cocos-console/en.md
Merge pull request #206 from dingpinglv/Iss_ReleaseNote

Update the version limit of python in cocos-console/en.md
Merge pull request #205 from minggo/doc-v3.0

update release note
H5: Catalog updated for Cocos2d-JS release
Merge pull request #207 from pandamicro/master

H5: Catalog updated for Cocos2d-JS release
H5: 添加中文版Cocos2d-html5 v3.0a发布说明
H5: some zh doc ref added
Merge pull request #208 from pandamicro/master

H5: 添加中文版Cocos2d-html5 v3.0a发布说明
H5: Add chinese doc ref
H5: Add cocos-console chinese doc and improve the doc content
H5: Add upgrade guide 3.0a chinese doc and improve the doc content
H5: Update release note and catalog for 3.0 release
Merge branches 'master' and 'master' of https://github.com/cocos2d/cocos-docs
Merge pull request #209 from pandamicro/master

H5: Update docs for Cocos2d-JS 3.0 release