Removed the automatic registration of GraphicsContextImplementation.
Removed the automatic registration of GraphicsContextImplementation.


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