Winamax fixes

[UgoM]

Hey ! I ran fpdb against my 500k+ hands, and corrected some bugs.

Almost everything takes place in WinamaxToFpdb.py, so shouldn't affect the rest of the software BUT I did a change Hand.py that you should look at: In Winamax, Holecards are given in the 'BLINDSANTES' street, so I had to change - self.holeStreets = ['PREFLOP'] to + self.holeStreets = ['BLINDSANTES', 'PREFLOP'] in Hand.py, to allow discovering holecards during the blinds/antes street. For what I understood, it shouldn't affect other websites, but still, I'm not the expert on fpdb.

There are 5 small commits, I can make 5 pull requests if you prefer, or put everything into a single commit or anything.

Cheers,