Add l10n_it_toponyms

Sorry to interfere: why not standard _res.country.state_? Do you have another intermediate classification. In Spain, we have country -> 17 regions -> 50 provinces. We have used _res.country.state_ for the provinces, because postal directions and so on are referenced by this. In some ocassions, someone puts `province, region`, or `province (region)` on the address, but it's uncommon. For that case, we have created a new object in a separate module called _res.country.region_. FYI, this module is not migrated to v7 because nobody has used it on that version.

Regards.