"League mode" scoring script

[privong]

For a series of games involving the same players, write a script to calculate the "league" score. Each player gets points for their relative finishing position in a game. For example, one possibility for a 4 player game is that first place gets 6 points, second place gets 3, third place gets 1, and fourth place gets 0. Tally these up across a series of games to show "league standings".

The script should take as inputs:

• information on which games should be used (specified as a list of gameIDs or a date range)
• (optional) points per finishing position

When a list of games is given, the script should go through and identify only those subsets of games which have the same sets of players. These should be presented to the user so the user can select which "league" to assess. This will handle instances in which "non-league" games were played mixed in with league games. Or alternately multiple "leagues" can be in place at the same time.