Facehugger overhaul

They now function like landmines. They don't move, but you can pick them up and throw them at people.
Eggs now grow gradually and you can harvest a hugger from a grown egg.

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@2438 316c924e-a436-60f5-8080-3fe189b3f50e

code/game/objects/items/item.dm

@@ -140,7 +140,9 @@
 /obj/item/attack_paw(mob/user as mob)
 
 	if(isalien(user)) // -- TLE
-		if(!user:has_fine_manipulation) // -- defaults to 0, only changes due to badminnery -- Urist
+		var/mob/living/carbon/alien/A = user
+
+		if(!A.has_fine_manipulation || w_class >= 4)
 			user << "Your claws aren't capable of such fine manipulation."
 			return