new releases - wumpus-basic-0.21.0, wumpus-drawing-0.6.0 and wumpus-tree-0.17.0

Copperbox revision 2547.

Updates to demos and cabal files prior to new releases for Hackage.


Copperbox revision 2548.

New release archives including Wumpus-Tree this time.

wumpus-basic-0.21.0
wumpus-drawing-0.6.0
wumpus-tree-0.17.0

The most notable change is the new distinction in Wumpus-Basic between "drawings" (collective) and graphic "objects" (elementary - possibly grouped). The includes the new LocDrawing module.