Readds the atmos venting tower
Adjusts the nuke op shuttle prison cell
Adds image for cult talismans

So they aren't blank when examined.
Readds the engine coolant replacement tvalve and splits the coolant loop into two pipenets again (allows for a pressure/temp difference).
Merge pull request #7249 from mwerezak/atmos-tower

Atmos tower, Nuke prison, talismans, engine