Fixed some runtimes with specieism, and blood transfer ignoring viruses' racial preferences.
Made it possible for virus to mutate and affect different species.
Smartfridges are now hackable. Also fixed a bug where one could not properly access the fridge in chemistry.
Merge pull request #4537 from JoeyJo0/dev

Yay smartfridges
Moar Medbay Tile Tags!

This is the way of the future!
Floor Tiles + Chem Change
Lights in Viro Access
Merge pull request #4545 from Ccomp5950/apc_rewrite

Effeciency Project: APC / Machinery power usage.
Merge pull request #4553 from Ccomp5950/hud_rewrite

Code effeciency project: HUD items rewrite.
Viro Scrubber Fix

Iz nao connect.
Fixed blood injections not transmitting viruses properly.
Keep forgetting that list is associative.
Changed sneezing to spread viruses like cough, but only in front of the mob.
It gives a warning sometimes, so guy has 7 ticks to face elsewhere.
Lowered chance of exhale spreading viruses, as it was firing way too often.
Medbay Double Airlocks

And another tile tag. Can't help myself!
Sink in a wall, yo.

Bastard!
Merge pull request #4561 from Vetinarix/dev

Medbay Tile Tags!
Merge branch 'dev' of https://github.com/Baystation12/Baystation12 into virus-racism

Conflicts:
	code/modules/virus2/helpers.dm
Merge branch 'dev' of https://github.com/Baystation12/Baystation12 into dev
Merge branch 'dev-freeze' into dev

Conflicts:
	maps/tgstation2.dmm
Merge branch 'dev' into virus-racism