Added new hygiene stat for villagers. If a villager's hygiene level becomes too low they will become unhappy, hygiene is increased when villagers take a bath.
Added new item "Bath", used by villagers to improve their hygiene, baths must be filled with water before use, either by connecting it to a water supply or by filling it with buckets of water.
Coal, iron ore and gold ore can now be found while mining mountains. Previously only stone could be found.