Update italian localization to 1.7.10

The italian localization for vanilla minecraft had quite a few changes, so here's the update.
I'll close https://github.com/ExtrabiomesXL/ExtrabiomesXL/pull/375 , and merge  https://github.com/ExtrabiomesXL/ExtrabiomesXL/pull/379 before this one so the localization is up to date.