API endpoint that get a instant by slug.

GET /api/v1/instants/errou-faustao/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "name": "Errou (Faustão)",
    "slug": "errou-faustao",
    "sound": "http://www.myinstants.com/media/sounds/faustao-errou.mp3",
    "color": "FF0000",
    "image": null,
    "description": "",
    "tags": ""
}