Update and fixes

- Added a lot more firedoors around the station
- Added the new areas for the four lobbies and the chapel's crem. and
the internal affairs office
-Remove the key from the janitor's starting equipment
-Fixed the layering for the firedoors and airlocks
-Upped the layer of the false walls so firedoors can be placed under
them
-Added a debug method for airlocks
-Added a readme for mapping