Correct some mistake and upgrade to 3.0 Final

Please be noted that:
1. Use always Cocos2d-JS, Cocos2d-html5 shouldn't be used
2. `cocos compile` with `-m release` can automatically generate jsc files, no need to use jscompile
Merge pull request #503 from pandamicro/patch-1

Correct some mistake and upgrade to 3.0 Final