[Tails-l10n] [review](de) download page update

Hi,

please review branch de-download-page

4417a69 Merge branch 'master' into de-download-page
b7b1a9b (de) wiki download page: rebuilt PO file, fix outdated or newly
        updated translations

in flapflap/tailsxlat.git

I rebuilt the download page and did some small cleanup (e.g. checked &
deleted "#|" backup lines).

cheers,
~flapflap