Initial testing stuffs.
Salt support for hstore.

Re-worked the Postgres sls file to add hstore to
the template1 database. This means it is added to
the exposure database and the test database that
Django creates.
Initial testing

- Cleaned up warning messages on start.
- Added URL names
- Added a unit test for each view.
- Switched to timezone.now rather than utcnow.
- reset migrations.
Merge pull request #21 from d0ugal/feature/tests

Tests!
Adding new urls.
Removing exif stuff Dougal broke.
Made slugs unique for a photo set - updated photo detail view.