From Martin Aumueller, added ref() and unref() to Inventor node handling.
From Martin Aumueller, added ref() and unref() to Inventor node handling.


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