Euchre - Expert AI

* Call for best option: let an alone player ask partner for their best card, then pass one card back before play begins. * Maker needs rule option: set how many tricks the makers must take to make their bid. * Alone march score option: set whether taking all tricks alone is worth 2, 3, or 4 points. * Alone must take all tricks option: an alone player must win every trick to make the contract. • UI improvements. • AI improvements.