Added an InitRegistry static intiialization and destrucion static to help control the order of construction and destruction of the osgDB::Registry.
Added an InitRegistry static intiialization and destrucion static to help control the order of construction and destruction of the osgDB::Registry.


git-svn-id: aa838dfc23441284dd616281de4245daec5d2135@14461 16af8721-9629-0410-8352-f15c8da7e697

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