Removed reference to :b in drone spawn text.
Removes lonely scrubber pipes:

Under table in security lobby
Beneath vending machine in escape
Beneath status display in staff meeting room
Beneath left door in AI Upload Access
Beneath status display by AI Upload Access
Inside window in starboard Engineering maintenance

Adds missing scrubber pipes:
Cargo warehouse, straight pipe
Between Medbay and Misc. Research

Restores lost scrubber:
Security checkpoint, Arrivals
Removes lonely supply pipes:

Beneath northeast door in security lobby
Beneath north Fitness maintenance door
Beneath table in Tech Storage
Room between Toxin Mixing and Launch rooms.
Beneath Engineering EVA maintenance door

Adds missing supply pipes:
Chemistry, straight pipe
Teleporter door, straight pipe (flips existing pipe)

Restores lost vent:
Security checkpoint, Arrivals
Adds missing APCs:

Engineering Monitoring
Mining Station Communications

Removes excessive APC:
Research Outpost hallway
Adds light switches.

Adds a wrench to the crowbar in the Warden's office to allow handling of flash barriers.
Corrects two fire extinguisher cabinets which had lost their pixel shifts.
Security specific pipe/air alarm changes.

Removes unnecessary air alarm in the evidence storage.
Enables two scrubbers, showers and tactical storage.
Reorganizes the scrubber pipes in the showers/tac.storage to go through the door instead of reinforced wall.
Merge pull request #5356 from PsiOmegaDelta/AllThePipes

Supply and scrubber pipes, APCs, and misc.
Couple of small tweaks.
Merge pull request #5361 from Zuhayr/master

Couple of small tweaks.