Added option for setting whether the front or back buffer should be read using --front and --back command line options.
Added option for setting whether the front or back buffer should be read using
--front and --back command line options.


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