MFbed: Update the German website.

www/de/Makefile 1.134 -> 1.139
www/de/administration.sgml new translation
www/de/developers.sgml new file
www/de/share/sgml/navibar.l10n.ent hook up administration.sgml
www/de/share/sgml/news.xml 1.53 -> 1.55

Obtained from: The FreeBSD German Documentation Project.