Added -1, -2 and -3 model creation options to osgshadow example.
Added -1, -2 and -3 model creation options to osgshadow example.


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