Fix bookmarklet for stats announcements and collections

This addition allows the bookmarklet to find Statistics Announcements and Document Collections
Title rendered as a required field
Rework rake tasks for overdue editions

Tweaks the rake task for listing overdue editions and adds one to
publish those that are overdue. The main change is that we only include
those that are more than one minute overdue, which gives enough of a
buffer for the workers to complete their work before something is
considered overdue.
ScheduledPublishingWorker ignores published editions

If the edition has already been published, there is little point in
failing with an exception, which forces a retry.
Merge pull request #1627 from alphagov/scheduled-publishing-tweaks

Scheduled publishing tweaks
Merge pull request #1621 from alphagov/fix-bookmarklet-statistics-announcements-collections

Fix bookmarklet for stats announcements and collections
Merge pull request #1624 from alphagov/title-field-required

Title rendered as a required field
Adjusts services and information pages styling
Merge pull request #1625 from alphagov/services-and-info-pages-adjustment

Adjusts services and information pages styling
Merge pull request #1623 from alphagov/allow-tagging-to-draft-tags

Allow tagging content to draft tags.

https://www.pivotaltracker.com/story/show/73971142