List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=-time_per_move&page=901
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=-time_per_move&page=900",
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            "description": "Just to see how many Indian Go players are actually active on this site :D",
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            "description": "Join the OST community (^-^)",
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            "description": "sfsfddsdfs",
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