Tournament List
List all tournaments or create a new tournament.
GET /api/v1/tournaments/?format=api&ordering=ranked&page=371
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"2017-05-14T09:30:41.326999Z", "ended": "2017-05-14T10:16:34.261837Z", "start_waiting": "2017-05-14T09:30:40.654512Z", "board_size": 19, "active_round": null, "icon": "https://cdn.online-go.com/5.1/img/trophies/gold_title_19.png", "player_count": 7, "ranked": true } ] }
