As upstream doesn't provide a tarball or file which contains the
version number, and instead just the plain dictionary file, getting a
new version of the source means:
  - get the new dictionary from http://foldoc.org/Dictionary.txt
  - compute the new upstream version as the last-modified-date of the
    file (can be seen via curl -I http://foldoc.org/Dictionary.txt)
  - create out of this a fake 'tar.gz' with the correct structure

A get-orig-source rule is provided which does this; however since the
upstream version is only based on date without time, multiple updates
in the same day could create conflicting upstream tarballs, so use
with care. Furthermore, it's not clear if the upstream timestamp is
correct/stable (the web site shows more recent changes, but we don't
know if the .txt file is up to date with what's on the web site), but
so far it seems consistent .

Also note that modifications to the upstream 'Dictionary' file should
be done via quilt, and not directly in the file (via git or any other
method).

 -- Iustin Pop <iustin@debian.org>, Sun,  8 May 2016 21:46:28 +0200
