Italian translation update

[Vincenzo Reale]

Hi guys,
I would share and submit a complete revision 
(spellchecked and with new strings) of the Italian 
translation for subversion.

https://drive.google.com/file/d/
0B9FgaTlI6p0ybGFhWjk1X3E3SDA/view?usp=sharing

Best regards,
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Vincenzo