#36 Deck result statistics

[Knitter]

This is a possible sub-feature of ticket 47 and should perhaps not be implemented until that one is in place.
After a game has been reported each decks internal statistics of wins / loss us also updated, allowing the player to see which decks she has the most success with.
Eventually this can also be broken down to a per-card statistic: By using that info we can then calculate which card(s) the player plays the most with (includes most often in a deck) and which card he usually loses with in deck... i return this could even help balancing games...