Install Python GI bindings and GTK on Travis
Install Python GI bindings and GTK on Travis

lathiat/avahi,lathiat/avahi,lathiat/avahi,lathiat/avahi,lathiat/avahi,lathiat/avahi,heftig/avahi,heftig/avahi,heftig/avahi,heftig/avahi,heftig/avahi,heftig/avahi