Duplicates the speed of the gameticker!

The emtiter beams were holding back the gameticker, 0.3 seconds per beam, now the sleep() is replaced with a spawn() instead.

This will add lag due to everything being faster.

code/modules/projectiles/projectile/beams.dm

@@ -71,8 +71,8 @@ var/list/beam_master = list()
 		..()
 
 	proc/cleanup(reference) //Waits .3 seconds then removes the overlay.
-		src = null
-		sleep(3)
+		src = null //we're getting deleted! this will keep the code running
+		spawn(3)
 			var/list/turf_master = beam_master[reference]
 			for(var/laser_state in turf_master)
 				var/list/turfs = turf_master[laser_state]