Added in play football data to /fixtures/results.

Added the down, the distance_to_go and the field_position as new fields that will be filled out for NCAAF and NFL games if the data exists.

"in_play": {
  "period": "2",
  "clock": "4:13",
  "last_play": "Timeout at 04:13.",
  "time_min": null,
  "time_sec": null,
  "balls": null,
  "outs": null,
  "strikes": null,
  "runners": null,
  "batter": null,
  "pitcher": null,
  "possession": "Buffalo Bills",
  "down": 1,
  "distance_to_go": "10",
  "field_position": "JAX 41"
},