Added support for PROTECTED modes into the .osg reading and writing.
Added support for PROTECTED modes into the .osg reading and writing.


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