List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=min_ranking&page=5945
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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                "name": "OGS Go Cup Title Tournaments",
                "summary": "Hi, I am Go Cup Tournaments. The photo is a cup, that mean: Make tournament",
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                "summary": "Like to play on a 13 x 13 board?",
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            "description": "Starts on 01.05.2014. (May 1st). For more information, see http://online-go.com/forum/thread/3493/ .",
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