Game rankings

[EliAndrewC]

Apparently there's some statistical voodoo being done to rank games according to their scores. Our admin page currently just shows the average scores, but there are different things we want to take into account, e.g. a game which got scores of [1, 5] has an average of 3, but we might want to rank that differently than a game which got [3, 3].

This was currently done through some experimentation and Excel macros, but there's no reason why this ranking system couldn't be integrated into the admin page next year.