The Research division is now a pure area instance.

With this it's now possible to create a grep, or similar check, for Travis to ensure /area{name = *} never happens again as this can cause issues with APCs.
Resets values for vents/scrubbers that were equal to the default.
Freezers now have appropriate icons on the map depending on state. Cleans up freezer and medical door vars.
Arranges vent settings, default values and icon state in particular.
Replaces airless turfs in medbay with airfull variants. Adds protection around disposal chutes.
Merge pull request #5732 from PsiOmegaDelta/VentsScrubbers

Vents, scrubbers, freezers, more - OCD