Bump govuk_content_models to get LinkValidator.
Merge pull request #205 from alphagov/link_validation

Bump govuk_content_models to get LinkValidator.
Move custom assertion method.

Defining the assert_correct_state within a shoulda context caused
meant that in some cases the method was not found. Moving it to a
wider context (the test class) fixes this.
Merge pull request #207 from alphagov/move_assertion_method

Move custom assertion method.
Migrate business support locations to mapit area identifiers.

Leaving the business support locations facets in place, use these
to populate mapit areas identifiers in the areas array field.
Add rake task for bsf locations migrator