Load geographies into the app so they are accessible on division pages

[fgregg]

The OCD Vagrant setup includes a set of tasks for loading and joining geographies to jurisdictions. IIRC, each of these three Django commands come from different Django apps.

• manage.py loadshapefiles will ingest the shapefiles (assuming their configs are proper)
• manage.py loaddivisions will ingest the OCD divisions
• manage.py loadmappings will create a relationship between the shapefiles and the divisions

In order to configure these, you'll have to:

• Add a download function for them
• Define them
• Add the mappings to Imago