[bug-gettext] Glade/GtkBuilder xgettext support

[Miguel Ángel]

Hi.

Sorry for the bunch of mails of this weekend. :)

I worked on GtkBuilder support and I have published my changes at
https://github.com/644rosen/gettext_gtkbuilder_support with the bugfixes
for Glade support and libexpat support extraction from x-glade.c in
separated branches. There is a "FIXME" in gtkbuilder support that I have
to do in a better way, but It is almost complete and integrated with
glade support.

Any comment is welcome.
Happy hacking!
Miguel