List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=-ended&page=3802
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "description": "Auf vielfachen Wunsch: unser erstes Afra-Turnier, der Einfachheit und Schnelligkeit halber \"nur\" auf 13x13.\n\nBitte tragt ein, ob ihr beim Turnier mitspielen wollt. Die Frist endet am 16.11. um 19 Uhr.\n\nMal sehen, was passiert.",
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