Move keys to a separate mod (Fix #1490)

mods/keys/crafting.lua

@@ -0,0 +1,28 @@
+--
+-- Crafting recipes
+--
+
+minetest.register_craft({
+	output = "keys:skeleton_key",
+	recipe = {
+		{"default:gold_ingot"},
+	}
+})
+
+--
+-- Cooking recipes
+--
+
+minetest.register_craft({
+	type = "cooking",
+	output = "default:gold_ingot",
+	recipe = "keys:key",
+	cooktime = 5,
+})
+
+minetest.register_craft({
+	type = "cooking",
+	output = "default:gold_ingot",
+	recipe = "keys:skeleton_key",
+	cooktime = 5,
+})