List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=-max_ranking&page=5362
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=-max_ranking&page=5361",
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            "name": "California spangled Cat tournament #11",
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            "description": "Let's playing around now\n\n<a> https://online-go.com/group/14076</a> welcome join",
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                "summary": "----------------------------------------------------------------------------------------------------------------------",
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            "description": "Welcome and have fun!",
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