[Cocos2d-JS] Add js about docs
Merge pull request #261 from pandamicro/master

[Cocos2d-JS] Add js about docs
add note for jdk and ide version
[Cocos2d-JS] Improve inheritance doc
Merge pull request #262 from honghui/master

add note for jdk and ide version
Merge pull request #263 from pandamicro/master

[Cocos2d-JS] Improve inheritance doc
Merge branch 'master' of https://github.com/chukong/cocos-docs
add chinese document for inheritance in cocos2d-js v3.0