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