Adds nuclear reactor, Fixes

- Adds Nuclear Reactor, 200 kw safe power, very efficient fuel usage. Emits radiation, should be designed around accordingly.
- Adds Old point defense batteries which use the old sprite.
- Fixes path errors on cruiser.dmm

code/modules/power/port_gen_vr.dm

@@ -0,0 +1,11 @@
+/obj/machinery/power/port_gen/pacman/super/potato
+	name = "nuclear reactor"
+	desc = "PTTO-3, an industrial all-in-one nuclear power plant by Neo-Chernobyl GmbH. It uses uranium as a fuel source. Rated for 200 kW max safe output."
+	icon_state = "potato"
+	time_per_sheet = 1152 //same power output, but a 50 sheet stack will last 4 hours at max safe power
+	power_gen = 40000 //watts
+	max_power_output = 5
+	max_safe_output = 6
+	temperature_gain = 80	//how much the temperature increases per power output level, in degrees per level
+	max_temperature = 450
+	anchored = 1