- I made human/handle_blood() less shitty.

- We no longer leave a blood trail if blood_volume is below a certain level which depends on the brute damage received. This way dragging a wounded player does have a bad effect.
- We no longer give humans a second reagents var containing blood, and we don't put exotic blood in the mob's reagents. Now we don't store any blood substance inside the mob, we only have a blood_volume var. When we draw blood with syringe we create the reagent that match the type (blood reagent, or an exotic blood reagent)
- can't draw blood from mob if it's low on blood, so we can't empty a mob of its blood entirely.
- Removed the blood type preference appearing in character setting.
- blood pack automatically show blood type, unless manually labeled.
- removed bloody_hands_mob human var and same name glove var.
- Some animals now have blood (pets, goat, cows)
- hitting and dragging mobs with actual blood in their veins leaves blood on you and a trail on the floor.
- probably other stuff that I'll mention in the PR.

code/game/objects/structures/kitchen_spike.dm

@@ -65,9 +65,7 @@
 			L.visible_message("<span class='danger'>[user] slams [L] onto the meat spike!</span>", "<span class='userdanger'>[user] slams you onto the meat spike!</span>", "<span class='italics'>You hear a squishy wet noise.</span>")
 			L.loc = src.loc
 			L.emote("scream")
-			if(ishuman(L)) //So you don't get human blood when you spike a giant spider
-				var/turf/pos = get_turf(L)
-				pos.add_blood_floor(L)
+			L.add_splatter_floor()
 			L.adjustBruteLoss(30)
 			L.buckled = src
 			L.dir = 2