Don't display categories for deleted bodies

When a body has been marked as deleted (currently only exposed in the
Zurich cobrand's admin) the categories for that body should not be
available on the report_new form.

Prior to this change there was an error running the
'zurich-overdue-alert' script, because it wasn't expecting the
'bodies_str' field to have any entries in the format 'x|y,z', this
prevents this problem from happening in the future (though it doesn't
fix any existing entries with this issue).
Add body deletion to admin interface.
Include version number on admin config page.
Version 1.3.
Merge branch 'master' into liverpool-cobrand