Return the list of public data files.

GET /api/public-data/?source=direct-sharing-141
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Cache-Control: max-age=0, no-cache, no-store, must-revalidate
Content-Type: application/json
Expires: Wed, 29 Jan 2020 14:28:56 GMT
Vary: Accept

{
    "count": 1,
    "next": null,
    "previous": null,
    "results": [
        {
            "id": 42007,
            "basename": "mPower-Parkinsons.zip",
            "created": "2018-05-01T22:57:04.167116Z",
            "download_url": "https://www.openhumans.org/data-management/datafile-download/42007/?key=ba7d615e-1fea-4827-8c90-1ceb4b13b355",
            "metadata": {
                "tags": [
                    "mPower",
                    "CSV",
                    "JSON"
                ],
                "description": "mPower data, original format"
            },
            "source": "direct-sharing-141",
            "user": {
                "id": "37872431",
                "name": "Gabriel Dean",
                "username": "gsdcomo"
            }
        }
    ]
}