#3 Updated Danish translation

[Torsten Martinsen]

Hi,

thanks for an excellent program. While browsing the
installation I noticed the "da.txt" file containing a Danish
translation. It appears to be incomplete (is this why it
cannot be selected in Options/Language?).

Anyway, I have corrected a number of spelling mistakes,
grammatical errors, and misunderstandings. New file
attached.

(This is based on 2.30 beta 28).