Bug#374220: use DocBook XML instead of debiandoc

["W. Borgert" <debacle@debian.org>]

I created a new test version for the dev-ref in DocBook XML.
IMHO it is ready to use. Changes:

  - reformatted English version to ease translation etc.

  - put files into language subdirectories (en, fr, ja)

(Non) issues:

  - I thought I had to change all xrefs into olinks, but this is
    not necessary

  - PDF creation for fr and ja is currently not used - it
    doesn't work

Instead of filling up the BTS with yet another huge file, I will
send the stuff to the maintainer and other interested parties.

Cheers,
-- 
W. Borgert <debacle@debian.org>, http://people.debian.org/~debacle/