did some more furnace stuff, also fixed to work with latest core version

sparkfurnace/depends.txt

@@ -1,2 +1,2 @@
 default
-sparktech
+sparkcore

sparkfurnace/init.lua

@@ -15,4 +15,4 @@ do
   end
 end
 
-minetest.debug(minetes.get_current_modname() .. " init complete")
+minetest.debug(minetest.get_current_modname() .. " init complete")

sparkfurnace/metalfurnace.lua

@@ -1,17 +1,17 @@
 minetest.register_node(minetest.get_current_modname() .. ":lv_furnace", {
-  description = "Electric furnace"
+  description = "Electric furnace",
   tiles = {
     "furnace2.png",
     "furnace2.png",
     "furnace2.png",
     "furnace2.png",
-    "furnace.png",
-    "furnace2.png"
+    "furnace2.png",
+    "furnace.png"
   },
-  groups = { oddly_breakable_by_hand = 1,
+  groups = { sparktech_techy = 1,
     sparktech_energy_conductor = 1,
     sparktech_energy_in = 50,
-    sparktech_energy_out = 17,
+    sparktech_energy_out = 10,
     sparktech_energy_nobalance = 1,
     sparktech_energy_max = 300}
 })