Release Notes: Now you can add shotguns, commandos, and imps to the maps. There's a RubyGem too.
Release Notes: Sergeants can now be added to maps.
Release Notes: Support has been added for creating a map from a line drawing.
Release Notes: This release includes simplified map-creation code, and support for barrels.
Release Notes: Maps can be displayed in a "Nethack" format, and the path-based map generation code allows for repeating patterns.