Laser pointers, overchargeflashes, various fixes

Alcohol and thermite now flammable.  Laser pointers added!  Flash now
comes in delicious incendiary flavor.  Robot fire overlay bug fixed-ish.
Being lit on fire turns off a borg's lights but the fire still shows.
I'll take it.  Shield gens actually useable by the people they were
meant for.

code/modules/mob/living/silicon/robot/life.dm

@@ -337,7 +337,7 @@
 	overlays -= image("icon"='icons/mob/OnFire.dmi', "icon_state"="Standing")
 	if(on_fire)
 		overlays += image("icon"='icons/mob/OnFire.dmi', "icon_state"="Standing")
-	update_icons()
+//	update_icons()
 	return
 
 /mob/living/silicon/robot/fire_act()

code/modules/mob/living/silicon/robot/robot.dm

@@ -483,6 +483,7 @@
 	..(Proj)
 	updatehealth()
 	if(prob(75) && Proj.damage > 0) spark_system.start()
+	update_fire()
 	return 2
 
 
@@ -784,6 +785,7 @@
 	else
 		if( !(istype(W, /obj/item/device/robotanalyzer) || istype(W, /obj/item/device/healthanalyzer)) )
 			spark_system.start()
+			update_fire()
 		return ..()
 
 /mob/living/silicon/robot/attack_alien(mob/living/carbon/alien/humanoid/M as mob)
@@ -979,6 +981,7 @@
 /mob/living/silicon/robot/proc/updateicon()
 
 	overlays.Cut()
+	update_fire()
 	if(stat == 0)
 		overlays += "eyes"
 		overlays.Cut()
@@ -1013,10 +1016,10 @@
 		else
 			icon_state = base_icon
 		return
-
+/*
 /mob/living/silicon/robot/proc/updatefire()
 	return
-
+*
 //Call when target overlay should be added/removed
 /mob/living/silicon/robot/update_targeted()
 	if(!targeted_by && target_locked)