Lighting overhaul.

This commit overhauls the lighting system to Bay12 standards. It is better
in pretty much every way.

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

@@ -432,7 +432,7 @@ CIGARETTE PACKETS ARE IN FANCY.DM
 					user.adjustFireLoss(5)
 					user.visible_message("<span class='notice'>After a few attempts, [user] manages to light the [src], they however burn their finger in the process.</span>")
 
-			user.SetLuminosity(user.luminosity + 2)
+			set_light(2)
 			processing_objects.Add(src)
 		else
 			lit = 0
@@ -445,7 +445,7 @@ CIGARETTE PACKETS ARE IN FANCY.DM
 			else
 				user.visible_message("<span class='notice'>[user] quietly shuts off the [src].")
 
-			user.SetLuminosity(user.luminosity - 2)
+			set_light(0)
 			processing_objects.Remove(src)
 	else
 		return ..()
@@ -478,19 +478,6 @@ CIGARETTE PACKETS ARE IN FANCY.DM
 	return
 
 
-/obj/item/weapon/lighter/pickup(mob/user)
-	if(lit)
-		SetLuminosity(0)
-		user.SetLuminosity(user.luminosity+2)
-	return
-
-
-/obj/item/weapon/lighter/dropped(mob/user)
-	if(lit)
-		user.SetLuminosity(user.luminosity-2)
-		SetLuminosity(2)
-	return
-
 ///////////
 //ROLLING//
 ///////////