Added simple DFP targetting report page.

Allows admins to see what tags and ad units have been targetted.
Sorted the tags in alphabetical order
Removed redundant code.

There is a lot of redundant spaghetti code here. Got rid of them.
Merge branch 'master' into fixSponsoredBadges

Conflicts:
	common/app/model/content.scala
Renamed template folder; sbt didn't like it
Fixed compilation bug
Merge pull request #4728 from guardian/fixSponsoredBadges

Fix sponsored badges, and added a simple ad targeting report tool