Some refactoring in world/game-object, expanded commandline parameter parsing.

Refactored game command system, added 'player' command. ...

Version 0.1 is now ready - ATL files are parsed properly, the world
and the player are created, and the player can move around inside
the world. The first stage of a long journey is hereby completed!
:-)

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.

Saved a lot of code by writing build-symbol, started on client module.

Parsing an ATL file now actually builds the *world*.

Enabled recursive loading of ATL files, implemented option command behaviour. ...

The latter caused many headaches, and great joy in its completion :D

Expanded interpreter, started on world.

Started work on the interpreter. ...

More code added to util.lisp, changed ATL syntax to suit Lisp better.