* Adjusted the python-gnupg so the comments regarding insecure
  invocation of commands via subprocess (shell=True) were a major
  historical issue and not a a current issue.
* Not including Vinay Sajip's requested change to say it is now secure
  since no audit of the current code base has been performed and my
  last major inspection of that code was around the time I first
  ported PyME to Python 3 in 2015.