Update roundup-mailgw install with other methods; formatting reference admin_guide.html for alternate imap/pop methods (imap_oauth or apop etc.) Change example written intline into an exampe as line wrapping distorts whitespace (space removed if line is wrapped) and needs to be presented in a pre example section.

License
=======

Roundup is Free Software under the following license (from the file
COPYING.txt in the software distribution):

.. raw:: html

   <div class="file_insert">

.. include:: ../COPYING.txt

.. raw:: html

   </div>