2) Changed Makedepend system to make individual dependency files, which
should save time rebuilding dependencies by limiting the regeneration
of dependency file for only modified source files.
before state, which fixes problem that can occur with state that needs
the current model view or projection matrices.
Changes osgreflect so that it uses ClipNode rather than clip plane, thereby
fixing the problems which occur when the above is applied.
Create a new osgProducer version of the original GLUT based version.