Merge branch 'master' of https://github.com/Baystation12/Baystation12 into bleeding-edge-freeze

Conflicts:
	code/modules/events/infestation.dm
Medical side-effects now appear on overdose.

Also reduced anti-toxins pill amount, because 50 units is way too much for a single pill.
Medical side-effects now appear on overdose.

Also reduced anti-toxins pill amount, because 50 units is way too much for a single pill.
Chemical rebalance across the board.

- Halved metabolism in general. This is not a huge change, and will probably work out fine.
- Nerfed metabolism for individual chemicals, for example spaceacillin, greatly.
- Made mildly toxic chemicals, like pure carbon, cause medical side-effects.
Merge branch 'feature' of github.com:CIB/Baystation12 into feature

Conflicts:
	code/WorkInProgress/Cib/MedicalSideEffects.dm
Merge pull request #2400 from CIB/feature

Medical side-effects now appear on overdose.
Merge pull request #2401 from caelaislinn/bleeding-edge-freeze

RUST updates, event tweaks, shielding updates
Merge pull request #2403 from caelaislinn/bleeding-edge-freeze

Miscellaneous minor things
Cryo now only injects as much chemicals as necessary.

Fixes the problem of people who were in cryo getting headaches forever.
Added priority system for surgery steps.
Steps with higher priority would be attempted first.

Added preparation step for item insertion surgery.
Gangrene!

Now germ level for organ has three thresholds.
LEVEL 1: Occasional (prob(10) every tick) tox damage and germ level raise.
LEVEL 2: In addition to that, tox damage and germ level raise every tick.
LEVEL 3: Limb necrosis. Currently does nothing but icon change. Also at this stage germs start leaking to connected organs, so amputations is necessary.
Debug verb to check how long it would take for gangrene to kick in.
Commented out gangrene for now.

I suck at branches, it got caught with my surgery fixes.
Merge branch 'bleeding-edge-freeze' of https://github.com/Baystation12/Baystation12 into bleeding-edge-freeze

Conflicts:
	code/modules/events/infestation.dm
Merge branch 'necrosis' into bleeding-edge-freeze
Made EMP less instarape switch for Nuke Team.
Instead of 50% chance to go off, it goes like that
30% Nothing happens
70% Malfunction:
    50% Tear off limb / big wound
    50% Bad malfunction:
      50% BOOM
      50% meltdown, won't activate ever

Which takes it from 50% to 17.5%
Merge pull request #2407 from caelaislinn/bleeding-edge-freeze

fixed compile error
Merge pull request #2406 from CIB/feature

Cryo now only injects as much chemicals as necessary.
Merge branch 'bleeding-edge-freeze' of https://github.com/Baystation12/Baystation12 into bleeding-edge-freeze
Derp, forgot main part of explosive implant EMP code and changelog.