Merge pull request #24 from lihex/develop

let commands split by category
Merge pull request #25 from lihex/develop

bug fix & code refactor
updated doc and removed some typos
+x on cocos.py
Merge pull request #28 from luisparravicini/doc

Updated doc plus fixed typos
Merge pull request #29 from luisparravicini/exec

+x on cocos.py
fix the typo
Merge branch 'develop' of git://github.com/cocos2d/cocos2d-console into develop