moderation migration
Begin hooking up moderation controls

Move moderation to own template for listing to allow redrawing it.
Move notes moderation controls onto same view as note, allowing view
to listen to their events.  Replaced thumbs_down with delete icon.
Add p3p header to DocumentsController#show

Move the set_p3p_header method from authentications controller to a
protected method on the application controller so it can be shared
between all controllers who may be embedded in an iframe.

This should provide a solution for issue #39
added approved endpoing and labels to show status