[Tails-l10n] [pull](de) wiki translation download page

Hi,

please merge branch nivatius-download

8d59f6e (de) wiki download page: added u's suggestions for language
improvement
d0c7ab9 (de) wiki download page: flapflap's last fixes
a4e2238 (de) wiki download page: second review by u. and flapflap
b4c3761 (de) wiki download page: review by u.
3544740 (de) wiki download page: review by flapflap
cfacb37 (de) wiki download page: poedit file header
9e0c797 Merge branch 'master' into nivatius-download
d69bb27 (de) wiki download page: some minor fixes
a7429cc (de) wiki download page: poedit header update (nivatius)
62e384f (de) wiki download page: lots of translated strings (nivatius)
a0815be (de) wiki download page: use formal 'Sie' instead of 'du' (nivatius)
d1663c2 (de) wiki translation for download page, minor fixes
4bebd7a (de) wiki translation for download page from nivatius

in flapflap/tailsxlat.git

cheers,
~flapflap