Created a view for browsing user photosets.
Changed photoset_list so that it no longer needed to be a private view.
Merge branch 'photoset-list'
Added a privacy field to PhotoSets
Photos and Photosets now 404 if they're not public and someone
other than the owner tries to view them.
Public photoset listings are now restricted to photosets
marked as public.
Added indicators of privacy.
Merge branch 'privacy'