Merge branch 'master' of https://github.com/tgstation/-tg-station
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yeah
Lot's of stuff, Read full Commit log

Cybernetic limbs
Multi-location operations
Limbs have sprites now (They never dropped before so it was irrelevant)
No Organic healing of Robotic limbs (But the message is still there, fixing soon)
No "organic" diseases in Robotic areas
No more operations in robotic areas - Cheer's Pete for the surgery system being so nice
Healing Robotic limbs with welders (brute) and cable (burn)
Probably other things I forget
Updates code/game/objects/items/stacks/medical.dm - Woopsie.
Became less selfish
Made it Easier to create your own Multiple location surgeries, updated surgery/multiple_location_example.dm to reflect this
Updated surgery/limb augmentation.dm to this new way of handling Multiple location surgeries.
YOU SAW NO TEST COMMENT!
Fixes #1716 as far as I have tested
Gives all turret cover types their own Ex_act's
prevents the gun from deleting the cover

Tested on
-Turret
-Just cover
-Porta_turrets
-Just porta turret cover
Basic usage of blend_mode

Areas - fire and party alarms look better
Druggy 420 blazeit screen looks better
The whiteness of a flash looks nicer. Mob code makes me hesitant to really change this.
The nearsighted/welding mask dither looks better

If you want screenshots just ask.
Merge branch 'master' of https://github.com/errorage/-tg-station
Merge branch 'master' of https://github.com/tgstation/-tg-station
Merge pull request #1729 from MrPerson/zone_of_the_blenders

Basic usage of blend_mode
Fixes Chem healing and Chem damaging of Robotic limbs
Hey @Cheridan NO ISTYPES! :D
Ugh.. I mean "Removes" 10 totally unnecessary istypes
Fixes the healing of robotic limbs so that the message actually doesn't display now.

Credit to ACCount12 for digging around and finding some nifty code
that my brain never thought of
Fixes an earlier attempt at the previous commit
Fixes a comment that was a DIRTY LIAR
Adds a robotic limb heal proc
this is due to the original proc having a check in it now which saves us
millions of snowflakey checks, if you wish to heal a robotic limb use
heal_robotic_damage(brute,burn) it functions the same as heal_damage
but actually heals robotic limbs instead of organic ones

Updated the welding and wiring repairs to use this proc
New Human EMP_act
Old one was shite and I broke it somewhere
Added food bags. (Sprites don't work yet)
Condiment packs are mostly working. Still no sprites.
Merge branch 'master' of https://github.com/tgstation/-tg-station