From Luigi Calori, clean up CMakeLists.txt
From Luigi Calori, clean up CMakeLists.txt


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