Balance Changes, Better UI and tweaks!

Balance Changes - Medibots now respond to oxyloss with inaprovaline
instead of tricord. This is intended to keep a critical patient alive
until he can get help.

All bots now have an attack cooldown.

All bots now use the dark UI instead of the previous one.

Code tweaks:
- All bots now have a master Topic() containing their common commands.
- Bots can no longer open blast doors/shutters, and will not attempt to
path through them if closed.