Create a forfeit flag for watMu games

[BruceJohnJennerLawso]

So watMu games where one team fails to show up are usually recorded as forfeits in the system as a 3-0 loss, -2 SOC. This means that our sample size of games is effectively shrunk by one game for each team that season, and the SOC rating & scores will likely skew many metrics. The game object should identify itself as a forfeit, both from the side of the team that forfeited (easy because the 3-0 and -2 are listed), and from the perspective of the other team (harder because the -2 doesnt show up on their SOC, but it should be possible to compare the other team and find the game based on date/time/venue