other stuff to do
  auto-solve only works when size (ie the number of cubes) on the sides arss
    are all the same and the size is either 2 or 3; a 4x4x4 solver needed
  better frame for 3D.
  Much left to do for GL including:
    mouse interface for GL, 3 ways to proceed
      1. Use a OpenGL library, anything portable out there?
      2. Find faces mouse is on, similar to xthreed
      3. Approximate face by using 3d code
    junk the sudo 3d interface when GL is done.
