Added support for 4,7,12,16 bit luminance and intensity formats
Added support for 4,7,12,16 bit luminance and intensity formats


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