Using simpler tags in seahorse/gnome-keyring

[Stef Walter <stefw gnome org>]

I'd like to use simpler git tags in seahorse and gnome-keyring. This
helps keep things simpler and reduces typing and verbosity.

Instead of:

  GNOME_KEYRING_2_91_0

I'd use:

  2.91.0

In these projects:

  gnome-keyring
  seahorse
  seahorse-plugins
  seahorse-sharing (soon)

Does this make sense? I don't think there are any draw backs. Lots of
projects are doing this on git.gnome.org (eg: gtk+)

Cheers,

Stef