MFde: Update the German website.

www/de/docproj/submitting.sgml fixes only
www/de/news/Makefile 1.50 -> 1.51
www/de/news/news.sgml 1.50 -> 1.51
www/de/news/2007/Makefile new file
www/de/news/2007/news.xml new file
www/de/news/2007/press.xml new file
www/de/share/sgml/libcommon.xsl fixes only
www/de/share/sgml/news.xml 1.212 -> 1.213
www/de/share/sgml/press.xml 1.70 -> 1.71

Obtained from: The FreeBSD German Documentation Project