Added class to keep track of familiars in positions.
Added class to keep track of familiars in positions.

This class could potentially be excessive, where I could use instances
of the Brigade class itself.  However, this would require using Familiar
or FamiliarType instances instead of FamiliarWinPercent (which itself
could be a subclass of FamiliarType) or simply strings.

thailyn/BrigadeRoulette