Added ability to write out the selected parts of the scene graph.
Added ability to write out the selected parts of the scene graph.


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