Updated MinetestForFun Game

- Moved farming and screwdriver into MinetestForFun Game
 - Updated files (mostly `is_ground_content`)
 - Removed weird partial copy of jukebox in MinetestForFun Game

minetestforfun_game/mods/farming/grass.lua

@@ -0,0 +1,28 @@
+
+-- Override default grass and have it drop Wheat Seeds
+
+for i=1,5 do
+
+	minetest.override_item("default:grass_"..i, {
+		drop = {
+			max_items = 1,
+			items = {
+				{items = {'farming:seed_wheat'},rarity = 5},
+				{items = {'default:grass_1'}},
+			}
+		},
+	})
+
+end
+
+-- Override default Jungle Grass and have it drop Cotton Seeds
+
+minetest.override_item("default:junglegrass", {
+	drop = {
+		max_items = 1,
+		items = {
+			{items = {'farming:seed_cotton'},rarity = 8},
+			{items = {'default:junglegrass'}},
+		}
+	},
+})