Update the ISO verification instructions using GNOME
In our ISO verification instructions for GNOME we advertise the use of
OpenPGP through seahorse-plugins, but that used to be broken on recent
Debian and Ubuntu.
intrigeri reported that:
- It works fine in testing/sid.
- For Wheezy, one needs to install seahorse-nautilus +
from the backports, then it works just fine.
Status for Ubuntu should be investigated and updated.
Feature Branch: doc/7162-gnome_verif