Added plane to triangle intersections and segment combining, work still not complete though.
Added plane to triangle intersections and segment combining, work still not complete though.


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