Added meta robots noindex, nofollow to main layout
Show notice about VPN when there are online resources and user is not within upb net
Handle missing http referer error by redirecting to searches_path
Display resource links for non-online-resources (if present)
Keine Verlinkung für Sonderfall "weitere ungenannte Autoren".
Trennzeichen die den Bibliothekar zufrieden stellen.
Added ISBN to index field dropdown box in search bar