Upon researching Stonecutting, adds a crafting process using stone chunks and hay to be able to construct stony and regular soil. You CANNOT remove the floor once it's finished constructing since it literally is just terrain at that point. For all the game knows that soil has been there the whole time.
New Items:
Gravel - Requires 1 stone chunk
Dirt - Requires 1 gravel
Floors:
Stony Soil - Requires 1 gravel and 18 hay
Soil - Requires 1 dirt and 36 hay
I don't want this to be easy dirt wherever, so construction times are high and just stony soil requires one fully grown hay's harvest, while regular soil requires two.
