World: r3wp

At this point, providing the full capabilities of OpenGL to REBOL 
seems trivial, once the image! improvements are added to Extensions 
API.


Some form of callbacks would also allow us to use a different window 
manager than VID (which would make it faster, since we wouldn't need 
to convert to rebol bitmaps at each frame).

(note that the GLut window manager is already available on most OSes, 
so this makes it even simpler to port, once extensions are ported 
to other platforms.  :-)