Use a case statement in Bouncer#call
Indent when as deep as case in Bouncer#serve_status

Per (arbitrarily) https://github.com/styleguide/ruby
Add newlines to the end of files

Per git-stripspace.
Indent 2 spaces, not 4
Use spaces inside hash literal braces

Per https://github.com/styleguide/ruby etc, this is the more common
style.

I don't expect this to stick, but I had to try!
Avoid unnecessary return
Merge pull request #3 from alphagov/nit-picking

Nit picking