Fix typo.
Return A to Z list if only the "other" group is present.
Merge pull request #14 from alphagov/a-to-z-if-other-only-group

Show the A to Z list if only the "other" group is present.
Bump Rails to 4.1.8
Merge pull request #15 from alphagov/bump-rails-to-4-1-8

Bump Rails to 4.1.8