Fix for media search

Media search wasn’t working correctly on media caption.  Rearranged the
joins so we’re joining tags on media rather than media on tags.
Cleaned up a few unused files, fixed a few bugs

Some unused files removed: admin/archive admin/logs, beta view,
admin/settings, twtest (old twitter stuff).

Changed Cinema link to go to the blog page rather than the calendar
page (that should be its own link, or maybe not, but this is better to
look at for now)

Fixed the permissions page so that it actually updates when the user
clicks on the checkboxes

Extracted the film page slider stuff into a view.
Merge branch 'rd-dev'