Integrated the 'Start' player construct into ATL. ...

Also some refactoring.

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.