Added KdTreeBuilder calls into FindCompileableGLObjectsVisitor, and an alternative  path that explictly calls the KdTreeBuilde when required in cases when no pre compile of GL objects is required.
Added KdTreeBuilder calls into FindCompileableGLObjectsVisitor, and an alternative 
path that explictly calls the KdTreeBuilde when required in cases when no pre compile of GL objects is required.


git-svn-id: 23b6355f2bb369032457de4eb5f713ee134f73a8@8543 16af8721-9629-0410-8352-f15c8da7e697

joevandyk/osg,joevandyk/osg,joevandyk/osg,joevandyk/osg,joevandyk/osg