Filter out invalid games

[JoshVarty]

Once we are ready to build a dataset, we should make sure to filter out invalid game modes. See: https://wiki.teamfortress.com/wiki/WebAPI/GetMatchDetails

We don't want to run our model against Turbo games.

[JoshVarty]

We probably want to look at:

• lobby_type

  lobby_type
  -1 - Invalid
  0 - Public matchmaking
  1 - Practise
  2 - Tournament
  3 - Tutorial
  4 - Co-op with bots.
  5 - Team match
  6 - Solo Queue
  7 - Ranked
  8 - 1v1 Mid

• game_mode

  game_mode
  0 - None
  1 - All Pick
  2 - Captain's Mode
  3 - Random Draft
  4 - Single Draft
  5 - All Random
  6 - Intro
  7 - Diretide
  8 - Reverse Captain's Mode
  9 - The Greeviling
  10 - Tutorial
  11 - Mid Only
  12 - Least Played
  13 - New Player Pool
  14 - Compendium Matchmaking
  15 - Co-op vs Bots
  16 - Captains Draft
  18 - Ability Draft
  20 - All Random Deathmatch
  21 - 1v1 Mid Only
  22 - Ranked Matchmaking
  23 - Turbo Mode