TODO list for Copper3D:

1. Implement solid polygons.
   RATIONALE: Any good 3D engine should support solid polygon
   rendering.  It allows for a richer 3D experience.
   
2. Implement colored triangles.
   RATIONALE: Currently, all triangles are white, which makes
   is fine for wireframe but will not work when using solid
   polygons.
   
3. Implement a user input system.
   RATIONALE: Currently, the output target doesn't respond to
   user input.  This makes it difficult to write interactive
   programs.
   
4. Implement lighting.
   RATIONALE: A good 3D engine should have lighting to increase
   the realism of the system.