Map changes

Makes APCs with different cells specific types.
Replaces arrival's APC with a higher-capacity cell variant to avoid people being unable to leave due to power failure at 12:15.
The engine core now begins without oxygen but still requires cooling and everything else.
Merge remote-tracking branch 'upstream/master' into ColdEngine
Merge pull request #6400 from PsiOmegaDelta/ColdEngine

Map changes