Match ratings endpoint

Need a http endpoint for replay site to be able to fetch ratings info for a specific match. Ideally it would return something like this:

• gameId
• ratings type id/name (e.g. ffa)
• players (array):
  • userId
  • username (for this match)
  • mu value before the game
  • mu value after the game
  • sigma value before the game
  • sigma value after the game