Added setting of ambient bias uniform 
Added setting of ambient bias uniform 


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