GTK3 parallel installable apps

[Stef Walter <stefw gnome org>]

I'm working on making seahorse build against gtk3 and be parallel
installable with gtk2. This brings up the a question.

Are we trying to make the following parallel installable?

 * locale/translations
 * icons/pixmaps
 * documentation
 * gtk-doc docs
 * manual pages
 * dbus activation

For example would we rename the gettext domain? I'm not sure how
parallel installable dbus activation would even work, since two
activation files would be installed with the same service.

Put another way ... Are we trying to make it so:

 a) Any version of the app compiled against GTK 2.0 can be installed
    in parallel with the one built for GTK 3.0.

 b) The same version of the app compiled against GTK 2.0 can be
    installed in parallel with the one built for GTK 3.0.

Cheers,

Stef