* Add IDs handling directly in library : it's a newtype phantom type to generate IDs for any type and it's used to make IDs for players and KoiKoi games which allows to decrease the arity of the Player constructor
* Some more useful function were added to the Hanafuda module : they simplify Yakus a bit and will be useful for Hannah, the bot to come soon — Yakus were extended further by defining a notion of distance to a Yaku that will hopefully help a bot determine how close it is from scoring a Yaku