added meaning of game 253, meaing of 20 byte unknown block; verified stuff about number of rounds
added meaning of game 253, meaing of 20 byte unknown block; verified stuff about number of rounds

entropia/tip-toi-reveng,entropia/tip-toi-reveng,christiannolte/tip-toi-reveng,entropia/tip-toi-reveng,jovermann/tip-toi-reveng,jovermann/tip-toi-reveng,colinba/tip-toi-reveng,christiannolte/tip-toi-reveng,colinba/tip-toi-reveng,entropia/tip-toi-reveng,colinba/tip-toi-reveng,christiannolte/tip-toi-reveng,jovermann/tip-toi-reveng,jovermann/tip-toi-reveng,entropia/tip-toi-reveng,entropia/tip-toi-reveng,christiannolte/tip-toi-reveng,colinba/tip-toi-reveng