Added races and character classes, wrote safe-guard against circular imports.

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

Integrated interpreter.lisp with atlantis.lisp, various bug fixes.

Expanded interpreter, started on world.

Started work on the interpreter. ...

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