solved 2 bugs
added an return where one was missing and changed the name of two
constants which are different from those in the ccbi files which the
cocosbuilder generates. This bug generates in Firefox  popups.
added keyboard events to CCLayer
fix a ==
description update
Added multitouch handling to the CCTouchDispatcher.
I have tested it in an ipad3.
The behavior should match the native cocos2d iPhone version.
update authors and reformat codes
update authors
Merge pull request #776 from linshun/many20-master

Push Many20 master's commit