List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=max_ranking&page=245
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=244",
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                "name": "GO Italia",
                "summary": "Il gruppo per i giocatori di GO italiani.",
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            "description": ":) :) :)",
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                "summary": "The perfect group for beginners",
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        {
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            "description": "Join the group for more cat tournaments ^__^",
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        {
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