Remove locations field
Move partials from admin views
Retrieve Areas from Imminence.

Adds a convenience class for retrieving and memoising Imminence area data.
Update gds-api-adapters
Add select2 dependencies
Remove unused business support javascript
Expose areas as javascript
Add areas select2 field and checkbxoes to form.

Adds a search and select style select2 form component and two
convenience checkboxes for selecting all UK or all English areas.
Move Area data model class to models
Add retina-ised icons
Test that selecting uk areas deselects english areas
Add select2 bootstrap styles
Merge pull request #212 from alphagov/add_areas_selection_bs

Add areas selection to business support editions