Fix timezone of publication queue notification

The server appears to be set perpetually in UTC so the app is unaware of the
switchover to BST. The addition of the view helper gives us a convenient way
of finding the local time for London from the UTC times in the database without
getting into timezone hell.
Publish task ordering implemented incorrectly

Everyone be good and read your mongoid docs :)
Tidy up publish task API by collapsing scopes

As the scope is "for_manual" and the use case of these task logs is such that
they must be in newest first order, this scope now implicitly orders the
returned records.

The separate ordering scope has been removed.

This change makes the API smaller and more testable as chaining is no longer
necessary.
Merge pull request #237 from alphagov/bugfix/manual-publish-task-ordering

Bugfix/manual publish task ordering
Merge pull request #236 from alphagov/bugfix/no-time-zone-manual-notification

Fix timezone of publication queue notification
Updates to ID funding schema