Moved the RenderLeaf implementatation across to always applying matrices

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.

Make/makedirdefs

@@ -83,6 +83,7 @@ EXAMPLE_DIRS = \
 	osgconv\
 	osghud\
 	osgtext\
+	osgreflect\
 	osgstereoimage\