Listing can now be marked as complete from the checkbox on the summary page.

Return to drafts button will return a listing back into drafts.

Listings cannot be marked as complete if they are not  they do not contain a saved version of all the pages in their flow.
Merge remote-tracking branch 'origin/master' into draft_to_completed_service

Conflicts:
	app/controllers/Service.java
Merge pull request #94 from alphagov/draft_to_completed_service

Tested locally and works