Configured fronts now understand editionalised urls

You can now us urls like the following...

/uk-edition
/us-edition
/culture/au-edition
Merge branch 'master' of github.com:guardian/frontend into dotcom
Merge branch 'master' of github.com:guardian/frontend into dotcom

Conflicts:
	common/app/views/fragments/header.scala.html
Merge pull request #1053 from guardian/dotcom

Configured fronts now understand editionalised urls