Add division_id to upcoming elections and mark test elections as such.

Adds a single `division_id` to the DC 2014 Primary entry. Also adds `is_test_election: true` to all feeds for election_id 2000.

When there are multiple relevant divisions, they can be specified by adding additional `division_id:` lines:
```
## DC Primary
data {
  nid: 3202
  election_id: 4017
  title: "DC 2014 Primary"
  division_id: "ocd-division/country:us/district:dc/ward:1"
division_id: "ocd-division/country:us/district:dc/ward:1"
division_id: "ocd-division/country:us/district:dc/ward:1"
division_id: "ocd-division/country:us/district:dc/ward:1"
  feed_url: "https://data.votinginfoproject.org/feeds/dc/vipFeed-11-2014-04-01.zip"
  user: "noma@turbovote.org"
}
```