District Instance
list: Return all districts, which can filter ballot items.
retrieve: Return a specific district, which can filter ballot items.
GET /api/districts/10325/?format=api
http://michiganelections.io/api/districts/10325/?format=api", "id": 10325, "category": "Local School District", "name": "Pewamo-Westphalia Community Schools" }{ "url": "