Migrate away from intltool/glib-gettextize and use gettext directly
intltool was needed because gettext hasn't have enough functionalities:
It used to be that Gettext could only translate strings in source code, and some limited other formats. Since about version 0.18, Gettext has been adding support for a lot more file formats that are used in modern GNOME desktop applications. This has slowly been making Intltool obsolete, which was invented to bridge that gap between what Gettext supported and what applications needed.
We don't need to use intltool and glib-gettextize anymore.
This can simplify xdt-autogen script.
First, test the port of a panel plugin, like xfce4-sample-plugin
See :