TBX: X.X, XTZImporter macro
Simplify the usage of AddFacsAttribute, AddFacsEdition and EditionUpdater macros.
details: https://groupes.renater.fr/wiki/txm-info/public/tutorial_macro_xtzimporter_en
(from redmine: issue id 1288, created on 2015/03/26 by Matthieu Decorde)