Huge Bundle of Fixes, Update Cooking to current Aurora

Cooking times are now no longer 10-15 minutes per item, the LARGEST items will take around ~4-5 minutes, 6 at the maximum in the case of the superbigbite (one of the most filling food items in the game).
Cooking oil tanks added
Appliances are now constructible instead of being eldritch black magic
Recipes are now reorganized to either fryer/oven/grill based on where they're made (Although recipes_microwave still needs a LOT more sorting)
Critical time bug with cooking fixed, AND you can now upgrade your appliances for even higher efficiencies!

code/modules/food/kitchen/cooking_machines/oven.dm

@@ -6,14 +6,16 @@
 	cook_type = "baked"
 	appliancetype = OVEN
 	food_color = "#A34719"
-	can_burn_food = 1
+	can_burn_food = TRUE
+	circuit = /obj/item/weapon/circuitboard/oven
 	active_power_usage = 6 KILOWATTS
+	heating_power = 6000
 	//Based on a double deck electric convection oven
 
-	resistance = 16000
+	resistance = 30000 // Approx. 12 minutes to heat up.
 	idle_power_usage = 2 KILOWATTS
 	//uses ~30% power to stay warm
-	optimal_power = 0.2
+	optimal_power = 0.8 // Oven cooks .2 faster than the default speed.
 
 	light_x = 2
 	max_contents = 5
@@ -74,19 +76,27 @@
 
 	if(open)
 		open = FALSE
-		loss = (active_power_usage / resistance)*0.5
+		loss = (heating_power / resistance) * 0.5
 		cooking = TRUE
 	else
 		open = TRUE
-		loss = (active_power_usage / resistance)*4
+		loss = (heating_power / resistance) * 4
 		//When the oven door is opened, heat is lost MUCH faster and you stop cooking (because the door is open)
 		cooking = FALSE
 
 	playsound(src, 'sound/machines/hatch_open.ogg', 20, 1)
 	update_icon()
+	
+/obj/machinery/appliance/cooker/oven/proc/manip(var/obj/item/I)
+	// check if someone's trying to manipulate the machine
+
+	if(I.is_crowbar() || I.is_screwdriver() || istype(I, /obj/item/weapon/storage/part_replacer))
+		return TRUE
+	else
+		return FALSE
 
 /obj/machinery/appliance/cooker/oven/can_insert(var/obj/item/I, var/mob/user)
-	if(!open)
+	if(!open && !manip(I))
 		to_chat(user, "<span class='warning'>You can't put anything in while the door is closed!</span>")
 		return 0
 
@@ -117,6 +127,7 @@
 /obj/machinery/appliance/cooker/oven/finish_cooking(var/datum/cooking_item/CI)
 	if(CI.combine_target)
 		CI.result_type = 3//Combination type. We're making something out of our ingredients
+		visible_message("<span class='notice'>\The [src] pings!</span>")
 		combination_cook(CI)
 		return
 	else