Small Brig Revamp

- Seen here (http://i.imgur.com/9MRr0cD.png) : Extended Execution Area
to the Observation Room
- Seen here (http://i.imgur.com/SeoyG1n.png) : Added Brig Medbay,
Interrogation Room (North) and Brig Recording Room (South). All these
rooms have functional power and lightswitches. Basic Atmos was added to
Brig Medbay and some of the atmos around it reshuffled

Included too :

- Fixed a rwall being replaced with a patch of grass by Engineering
- Removed science tile in Zoo and replaced with grass, renamed both
windoors
- Removed duplicated Pod Bay APCs
- The Brig Doors are now above the Brig Shutdown doors, meaning they can
now be interacted with and repaired when bolted open (notably in a
greytide virus event). This was done after the screenshots and is not
shown
- Increased lighting in Execution by adding some lights, also not shown
since done later
- Eastern Firing Range windows moved one tile down as per player's
request