Moving substation mapfixes onto dev-freeze

Also has a couple of very minor features but this is easier and faster than trying to get Gamer to rebase onto dev-freeze.

Actual feature changes now making it onto dev from this PR:
- An additional AI sprite was added.
- Fire alarms can be deconstructed.
- Stationwide alerts have been changed (backend stuff).
- Vox suits have increased stun resistance.
- Direction signs have apparently been added to the map.