Replace ids with slugs in areas responses

Normalise regions by supplying an 'England' region and adjusting
any other region names to match previous location data.
Merge pull request #91 from alphagov/add_slugs_to_areas_response

Replace ids with slugs in areas responses
Bump gds-sso to 9.3.0

This is to fix an issue with transfer ot bearer tokens. See
https://github.com/alphagov/signonotron2/pull/245 for details.
Remove redundant gemfury source

we're not using any gems hosted here any more.
Remove pinning of faraday.

Jenkins shouldn't be resolving dependencies as we've checked in the
Gemfile.lock.
Merge pull request #92 from alphagov/bump_gds-sso

Bump gds-sso to 9.3.0