Basic setup for the frequency modifier thing.

Alterable Items
- Airlocks
- Buttons
- Ignighters
- Air Injecters
- Mass Drivers
- Convayor belts
- Shutters
- Wall mounted flashers

External Airlocks like the ones at the solars are going to take a little
more setup to get working as there are 7 things that need changing.

Bluespace Techs spawn with one in their bag.

Gravity no longer spams SoundScopes wil messages

code/ATMOSPHERICS/components/unary/outlet_injector.dm

@@ -144,4 +144,12 @@
 		else
 			icon_state = "[i == 1 && istype(loc, /turf/simulated) ? "h" : "" ]exposed"
 			on = 0
-		return
+		return
+
+	attackby(obj/item/weapon/C as obj, mob/user as mob)
+		add_fingerprint(user)
+		if(istype(C, /obj/item/device/signaltool))
+			var/obj/item/device/signaltool/ST = C
+			id = ST.change_ID(id)
+			set_frequency(ST.change_freq(frequency))
+			return