From Laurens Voerman, "I hit a bug when making a copy of a PagedLOD node, the copy has lost it's _databasePath and can no longer load it's childen. " 
From Laurens Voerman, "I hit a bug when making a copy of a PagedLOD node, the copy has lost
it's _databasePath and can no longer load it's childen. " 

Added _databasePath(plod._databasePath), in the copy copy construcutor.




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