Modify the title
Merge pull request #200 from renshan/patch-2

Modify the title
Merge pull request #199 from dingpinglv/Iss_ReleaseNote

Simplify the release note of Cocos2d-JS
Merge pull request #201 from dingpinglv/Iss_ReleaseNote

Add a link in release note v3.0
update release note
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
update version requirement of python
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