Place results page

@wrightmartin This is ready for you to come in a give it a lick of style. Some useful info:

- The main view is `pombola/south_africa/templates/south_africa/latlon_detail_view.html`
- Each constituency office item gets rendered into `pombola/south_africa/templates/south_africa/constituency_office_list_item.html`
- The map styles are currently inline, so they'll probably need changing

Closes #784 
(Once the styling bits are done)