Research technical possibilities for OpenPGP verification in Python

https://wiki.python.org/moin/GnuPrivacyGuard
There are several principle ways to access GnuPG functions from Python:

1. use
   the official GPGME library or do something more low level like 2. run the gpg
   commands and pipe to them. The GnuPG initiative recommends using GPGME because
   it provides a documented API.

Verify if the solution would also work in Windows as we plan toport the installer to this platform.

Parent Task: #10315 (closed)

Original created by @u on 10319 (Redmine)