Improvments to Birdboat atmos plus others

- Birdboat has a drone shell dispenser
- Supply loop is seperated into a north and south loop, which
are not connected, south loop has its own supply tanks. Both loops
are also seperated by new airlocks.
- Expanded shuttle dock numbers (no change physically, but updated
numbers to inform what can dock successfully)
- Medical has an experimental space cooling system for cryo
- Moved disused medical freezer into maint
- Added mime can to Theatre, metal foam grenades to maint