Fixed fettcorp helmet oxygen bug

- Added FETTCORP Helmet, it features a rebreather and extensive protection from chemical hazards. Wear with the FETTCORP uniform for max protection against airborne threats!
- Reworked FETTCORP Heavy Beam Emitter to charge up and fire a powerful blast. While it's charging it emits a powerful cutting beam, which you can use on its own to deal some light damage or as a utility tool for cutting doors.
- Buffed Assault Suit protection from 20% to 30%, making it more protective than the vanilla combat suit (25%)

- Added FETTCORP Energy Pistol
- Added FETTCORP Energy Rifle
- Added FETTCORP Energy Marksman Rifle
- Added FETTCORP Energy Anti-Materiel Rifle
- Added FETTCORP Energy Beam Emitter
Added a slew of custom perk choices for Mission Modes.
- Added "Reinforced Doors" upgrade, this is completely new and is available in campaigns too. Each level boosts the durability of doors by 20%.
Other upgrades:
- Increase the resistance of junction boxes to overvoltage
- Increase fabrication speed
- Increase deconstruction speed
- Reduce turret power consumption
- Increase turret rotation speed
- Increase turret view distance
- Increase the max output of reactors
- Increase the fuel efficiency of reactors
- Increase the speed of pumps
- Increase the speed of engines
- Increase the capacity of batteries
- Increase the recharge rate of batteries
- Increase the capacity of supercapacitors
- Increase the recharge rate of supercapacitors
- Reduce skill requirements to repair items, and make repairs faster
- Increase the durability of repairable items
- Add a mineral scanner to sonar monitors

Fixed exoskel spawning in cabinets

Fixed exoskeleton sprite path error

-EC-100 is immune to medicine, and is immune to most curse and darkness effects since it can't be blessed. Its major weakness is a lack of healing.
-Re-added Exoskeleton and tweaked its stats
-Added Backpack Exoskeleton which can carry a large quantity of items but if the battery runs out you're cooked
-Changing most placeable items to be picked up via crowbar instead of wrench to make repairs easier

- Rebalanced some outfits
- Determinus robes don't protect against physical harm as much
- Priest robes no longer protect against pressure