the 'help please' update, see discription.

we need to make gui.py make use of TERRAINMAP_BLOCK_SIZE.  I have it in
the code, but when i change out the res from 8 to 16 on terrain,png, and
adjust TERRAINMAP_BLOCK_SIZE from 8 to 16, the GUI.py does not work as
how it should.  I have set it back to TERRAINMAP_BLOCK_SIZE = 8 for now,
but we are running out of space in textures.png