Started implementing trading system (buying works now). ...

Also added UI for creator.lisp and other minor changes.

First commit on the single-player branch. ...

Networking is proving to be a major challenge, so I'm bypassing it for now...
Refactored the start menu.

Refactored define commands, started integrating monsters into the game world.

Finished the 'goto', 'place' and 'help' commands. ...

I noticed that the code is starting to look quite crufty - time
for a clean up, I think...

Started implementing in-game commands, expanded test world.

Created an ATL-mode for Emacs and expanded the test world.