First part of a fix for issue 818.

Removed some pointless, unused objects. (i'm looking at you, rubber chicken without a sprite)
Added a few new "features"- lighting cigs with igniters, and toggle-able bedsheets.
Slightly improved the cow gib sprite because if I don't commit it now I'll revert it.

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@4517 316c924e-a436-60f5-8080-3fe189b3f50e

code/game/objects/grenades/chem_grenade.dm

@@ -43,7 +43,7 @@
 				stage = 2
 			else
 				user << "\red You need to add at least one beaker before locking the assembly."
-		else if ((istype(W,/obj/item/weapon/reagent_containers/glass/beaker)||istype(W,/obj/item/weapon/reagent_containers/glass/dispenser)||istype(W,/obj/item/weapon/reagent_containers/glass/bottle)) && stage == 1 && path != 2)
+		else if((istype(W,/obj/item/weapon/reagent_containers/glass/beaker) || istype(W,/obj/item/weapon/reagent_containers/glass/bottle)) && stage == 1 && path != 2)
 			path = 1
 			if(beakers.len == 2)
 				user << "\red The grenade can not hold more containers."

code/game/objects/items.dm

@@ -7,7 +7,10 @@
 
 /obj/item/weapon/bedsheet/attack_self(mob/user as mob)
 	user.drop_item()
-	src.layer = 5
+	if(layer == initial(layer))
+		layer = 5
+	else
+		layer = initial(layer)
 	add_fingerprint(user)
 	return
 

code/game/objects/items/weapons/cigs_lighters.dm

@@ -106,6 +106,9 @@ ZIPPO
 		if(M.lit > 0)
 			light("\red [user] lights their [name] with their [W].")
 
+	else if(istype(W, /obj/item/device/assembly/igniter))
+		light("\red [user] fiddles with [W], and manages to light their [name].")
+
 	//can't think of any other way to update the overlays :<
 	user.update_inv_wear_mask(0)
 	user.update_inv_l_hand(0)