Added support for setting DatabasePager thread priority via OSG_DATABASE_PAGER_PRIORITY.
Added support for setting DatabasePager thread priority via OSG_DATABASE_PAGER_PRIORITY.


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