Making the changes to support Sound, Callbacks and skew property in CCBReader
Modifyign CCBSequence to do proper copy of objects
Adding animation callback support for native classes
Adding dependency on CocosDenshion for CocosBuilderReader in Android makefile
Updating generator for CCBAnimationManager bindings
Updating CCBReader JS bootstrap file
Adding empty virtual definition to CCBScriptCallbackProxy to support CallFunc
Merge pull request #2194 from rohankuruvilla/ccbreader

fixed #1838: Latest CCBReader changes.