List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-min_ranking&page=101
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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    "previous": "https://online-go.com/api/v1/tournaments?format=api&ordering=-min_ranking&page=100",
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            "description": "8-10 kyu level players ... strong players say: \"the best defense is the attack\" ... i'm not a strong player ... i say: \"the best defense is the DEFENSE !\" ... let's see how it works ...",
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            "name": "สาระRails361! Tour ครั้งที่ 31",
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            "description": "Only a few close friends were invited.\n\n#RESPECT",
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            "name": "Free gamepoints for those in the know",
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