Add ‘balance’ command to organize teams based on trueskill

[eraether]

[eraether]

Created by eric (Eric Fields)

[eraether]

Easiest implementation: Permute through every combination and pick out the game closest to 100% balance (while ensuring that each team has at least 2 players).

However, this might be intractable for 8+ people, so we need a better way.