wumpus-basic

Copperbox revision 2100.

Adding haddock docs to PosGraphic module and initial re-working of the CtxPicture module.

CtxPicture lost the good combinator names to PosGraphic, so it needs new ones. One problem is that I'd like to encode directions rather than positions, but "horizontal" and "vertical" are too long and I already (over-) use h and v as prefix letters. I'm not sure all the name changes I've just made are suitable.