Create DIN-1505-2 (author-date-german) modified O.W.Barth_Verlag

Citation:
no changes

Bibliography:
-removed smallcaps
-removed publisher
-added full christian names for editors
-changed delimiter to slashes for multiple authors
-added closed french quotes (»«) for titles in books, journals, webpages
-changed delimiter to comma and removed capitalisation for "in:"
-changed retrieved format to full name of months