Migrate README docs to sphinxdoc

Signed-off-by: martin f. krafft <madduck@madduck.net>
diff --git a/doc/source/puppet.rst b/doc/source/puppet.rst
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+=========================
+Using reclass with Puppet
+=========================
+The adapter between |reclass| and `Puppet`_ has not actually been written,
+since I rage-quit using Puppet before the rewrite of |reclass|.
+
+It should be trivial to do, and if you need it or are interested in working on
+it, and you require assistance, please `get in touch with me
+<mailto:reclass@pobox.madduck.net>`_. Else just send the patch!
+
+.. include:: extrefs.inc
+.. include:: substs.inc