-Added "give disease" VV dropdown option.

-You cannot spread diseases which are marked as SPECIAL or NON_CONTAGIOUS via blood injections.
-Carp no longer drift in space.
-Captain helmet now protects you from facehuggers.
-All humanoid aliens can now Regurgitate.

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@4946 316c924e-a436-60f5-8080-3fe189b3f50e

code/modules/reagents/Chemistry-Reagents.dm

@@ -101,9 +101,11 @@ datum
 				src = null
 				for(var/datum/disease/D in self.data["viruses"])
 					var/datum/disease/virus = new D.type
+					// We don't spread.
+					if(virus.spread_type == SPECIAL || virus.spread_type == NON_CONTAGIOUS) continue
+
 					if(method == TOUCH)
 						M.contract_disease(virus)
-
 					else //injected
 						M.contract_disease(virus, 1, 0)