District Instance
list: Return all districts, which can filter ballot items.
retrieve: Return a specific district, which can filter ballot items.
GET /api/districts/3055/?format=api
http://michiganelections.io/api/districts/3055/?format=api", "id": 3055, "category": "District Library District", "name": "Suttons Bay Bingham District Library" }{ "url": "