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


scrawl/osg,marchelbling/osg,tomasthoresen/osg,scrawl/osg,scrawl/osg,tomasthoresen/osg,artoolkit/osg,artoolkit/osg,openscenegraph/osg,scrawl/osg,marchelbling/osg,artoolkit/osg,openscenegraph/osg,openscenegraph/osg,jtorresfabra/osg,jtorresfabra/osg,jtorresfabra/osg,tomasthoresen/osg,artoolkit/osg,jtorresfabra/osg,marchelbling/osg,openscenegraph/osg,tomasthoresen/osg,marchelbling/osg