Terms for specified facet

`facet_id`: "topics", "facility", "format", "genre", or "rights".

GET /api/0.2/facet/rights/children/
HTTP 200 OK
Allow: GET, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "total": 3,
    "page_size": 25,
    "prev": null,
    "next": null,
    "hits": [],
    "aggregations": {},
    "objects": [
        {
            "id": "rights-cc",
            "model": "ddrfacetterm",
            "facet": "rights",
            "term_id": "cc",
            "links": {
                "json": "http://ddr.densho.org/api/0.2/facet/rights/cc/",
                "html": "http://ddr.densho.org/browse/rights/cc/",
                "objects": "http://ddr.densho.org/api/0.2/facet/rights/cc/objects/"
            },
            "title": "DDR Creative Commons"
        },
        {
            "id": "rights-pcc",
            "model": "ddrfacetterm",
            "facet": "rights",
            "term_id": "pcc",
            "links": {
                "json": "http://ddr.densho.org/api/0.2/facet/rights/pcc/",
                "html": "http://ddr.densho.org/browse/rights/pcc/",
                "objects": "http://ddr.densho.org/api/0.2/facet/rights/pcc/objects/"
            },
            "title": "Copyright, with special 3rd-party grant permitted"
        },
        {
            "id": "rights-nocc",
            "model": "ddrfacetterm",
            "facet": "rights",
            "term_id": "nocc",
            "links": {
                "json": "http://ddr.densho.org/api/0.2/facet/rights/nocc/",
                "html": "http://ddr.densho.org/browse/rights/nocc/",
                "objects": "http://ddr.densho.org/api/0.2/facet/rights/nocc/objects/"
            },
            "title": "Copyright restricted"
        },
        {
            "id": "rights-pdm",
            "model": "ddrfacetterm",
            "facet": "rights",
            "term_id": "pdm",
            "links": {
                "json": "http://ddr.densho.org/api/0.2/facet/rights/pdm/",
                "html": "http://ddr.densho.org/browse/rights/pdm/",
                "objects": "http://ddr.densho.org/api/0.2/facet/rights/pdm/objects/"
            },
            "title": "Public domain"
        }
    ]
}