Lighting overhaul.

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

code/modules/power/singularity/containment_field.dm

@@ -9,7 +9,7 @@
 	density = 0
 	unacidable = 1
 	use_power = 0
-	luminosity = 4
+	light_range = 4
 	var/obj/machinery/field_generator/FG1 = null
 	var/obj/machinery/field_generator/FG2 = null
 	var/hasShocked = 0 //Used to add a delay between shocks. In some cases this used to crash servers by spawning hundreds of sparks every second.

code/modules/power/singularity/singularity.dm

@@ -18,7 +18,7 @@ var/global/list/uneatable = list(
 	anchored = 1
 	density = 1
 	layer = 6
-	luminosity = 6
+	light_range = 6
 	unacidable = 1 //Don't comment this out.
 	use_power = 0
 	var/current_size = 1