Added support for serailizing and scripting BoundingBox and BoundingSphere objects
Implemented Widget::handle, handleImplementation, traverse and travseImplementation() wrappers to enable them to be extended via scripting
Changed implementation of enums to use strings as lua type to make it easier to do comparisons and track values
Quitened down debug messages
Improved support for setting/getting properties via the osg::UserDataContainer.
Fixed handling of assignment of User Object's that replace existing Object with the specified propertyName.