List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=rules&page=256
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "started": "2013-05-23T18:38:05Z",
            "ended": "2013-05-23T16:38:05Z",
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}