Add warning to current_politician_position method.
The last few migrations seem to need South 0.8.

For me, with South 0.7, they just hang. Given updating to 0.8 is
just a one line change of the config file, that seems easier than
working out why.
Get the frozen models for core back.

In order to make more migrations for core we are going to need the
frozen models, so adding a blank migration which does nothing but
freeze core.
WIP commit as I want to change branches
Decide if a Position is political using the category.

Get rid of the redundant list of political positions in settings.py.
Slight simplification of active_parties method.

Work off Positions, not Persons.
WIP commit for south africa latlon view
Subclass PlaceDetailView for the latlon view.
Add basic view for a latlong.

This currently just lists the constituency offices for each party
which has them nearest to the point and the politicians representing the
Province which the point is in.
Merge branch 'issues/691-place-results-page'