Added basic german translation

Thanks for the commit rights. But i don`t want to directly push into upstream, to not push my local only changes (internal version number) to upstream by accident.

Here is a German translation. row/column/data/unused is not in uppercase, because (at least) in German this is bad style and feels a little bit "rude" (i.e. like SHOUTING)

Umlaut are in UTF-8.