Bug#1023294: ITP: python-oldmemo -- python-omemo backend for OMEMO 1

[From@bendel.debian.org:Martin <debacle@debian.org>]

Package: wnpp
Owner: debacle@debian.org
Severity: wishlist

* Package name    : python-oldmemo
  Version         : (no release yet)
  Upstream Author : Tim Henkes (Syndace) <tim@cifg.io>
* URL or Web page : https://github.com/Syndace/python-oldmemo
* License         : AGPL-3
  Programming Lang: Python
  Description     : python-omemo backend for OMEMO 1

Backend implementation for python-omemo, equipping python-omemo with
support for OMEMO under the namespace eu.siacs.conversations.axolotl
(casually/jokingly referred to as "oldmemo").