swf2lwf.rb: Improve generating scripts
HTML5: Fix generating colored image with rotated images in atlas
C#: Change Remove*EventHandler APIs and imporve Lua binding

Remove*EventHandler APIs now accepts only id that is the return value of Add*EventHandler or Set*EventHandler APIs.
LWF.RemoveEventHandler
LWF.RemoveButtonEventHandler
LWF.RemoveMovieEventHandler
Movie.RemoveEventHandler
Button.RemoveEventHandler
LWFObject.RemoveEventHandler
LWFObject.RemoveButtonEventHandler
LWFObject.RemoveMovieEventHandler
C++: Improve Lua binding
Cocos2d-x: Support 3.2alpha0