Translate remaining english strings to german

"vol.", "no.", "pp."

bibtexbrowser.german.php

@@ -7,13 +7,16 @@ $BIBTEXBROWSER_LANG['Book Chapters'] = "Buchbeiträge";
 $BIBTEXBROWSER_LANG['Chapter in'] = "Kapitel in";
 $BIBTEXBROWSER_LANG['In'] = "In";
 $BIBTEXBROWSER_LANG['Master\'s thesis'] = "Masterarbeit";
+$BIBTEXBROWSER_LANG['no.'] = "Nr.";
 $BIBTEXBROWSER_LANG['No date'] = "Kein Datum";
 $BIBTEXBROWSER_LANG['No publications present'] = "Keine Publikationen vorhanden";
 $BIBTEXBROWSER_LANG['Other Publications'] = "Andere Veröffentlichungen";
+$BIBTEXBROWSER_LANG['pp.'] = "S.";
 $BIBTEXBROWSER_LANG['PhD thesis'] = "Dissertation";
 $BIBTEXBROWSER_LANG['Refereed Articles'] = "Zeitschriftenbeiträge";
 $BIBTEXBROWSER_LANG['Refereed Conference Papers'] = "Konferenzbeiträge";
 $BIBTEXBROWSER_LANG['Refereed Workshop Papers'] = "Workshopbeiträge";
 $BIBTEXBROWSER_LANG['Technical report'] = "Technischer Bericht";
+$BIBTEXBROWSER_LANG['vol.'] = "Bd.";
 @define('LAST_AUTHOR_SEPARATOR',' und ');
 ?>