doc: Update Italian README

[Frédéric Delanoy]

2012/2/28 Luca Bennati <lucak3 at gmail.com>:
> I tried converting README.it to UTF8, instead of the current Extended ASCII,
> which works really bad on my system.
> However, it does not seems like Git caught this change: could this be done
> manually?

I applied the patch manually and it seems the conversion went fine.
Maybe there were some accentuated letters already.
(hint: 'iconv' can be useful for those kind of conversions, or a save
with your favorite editor)

BTW,

-6. ESEGUIRE I PROGRAMMI
+6. RUNNING PROGRAMS

seems wrong...

Frédéric