Added support for osg::Node::get/setNodeMask() into .osg format.
Added support for osg::Node::get/setNodeMask() into .osg format.


omega-hub/osg,omega-hub/osg,artoolkit/osg,stmh/osg,koshman86/osg,artoolkit/osg,artoolkit/osg,koshman86/osg,omega-hub/osg,ntoand/osg,ghub/osg,ntoand/osg,ghub/osg,artoolkit/osg,koshman86/osg,stmh/osg,ntoand/osg,ghub/osg,stmh/osg,XiaoCC/osg,koshman86/osg,XiaoCC/osg,stmh/osg,XiaoCC/osg,XiaoCC/osg,omega-hub/osg,XiaoCC/osg,ghub/osg,stmh/osg,ntoand/osg