Fix default format for de-fr-it locales

Most of the locales use a `format` option that displays a complete datetime (e.g., `yyyy-mm-dd hh:ii`) by default. Alas, these three locales (de, fr, and it) just display a date.

I also noticed an issue with the italian datetime format. If I read correctly http://en.wikipedia.org/wiki/Date_format_by_country, it appears the date format is `dd/mm/yyyy` and not `dd.mm.yyyy`.