Atmos/pipe corrections and additions - Round 2

Toxins Mixing Room was missing a gas pump in the mixing chamber itself.
Adds air alarms to research outpost isolation cells.
Relocates scrubbers/vents that were under firelocks to ensure that they will always belong to the correct zones.
Restores a missing power cable to the HoP's office, as was under a re-located scrubber anyway.