Notes on 0.19 support
update Clojure version to 1.5.1
Better error reporting in the lexer - show the string fragment it choked on. TODO: support for nonprintings.
Support 'naked' SFS files like part.cfg.

This changes the API slightly - save files now show up as an SFS with a single
child object of type GAME, rather than as a top level GAME object.
Add marginalia-generated docs