Added window size, state and stats event handlers to viewer to help with QA'ing simplification results.
Added window size, state and stats event handlers to viewer to help with QA'ing simplification results.

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