Update italian translation
Many values of to the italian translation are not defined. I'm quite new to Vtiger but I'm eager to give a hand.
As long as I can understand, as soon as VTiger completes its installation, multiple modules are downloaded. Within these, there's the "Italian translation for Vtiger 6.1" which also is incomplete.
So I'll update only the files that are not added or modified by "Italian translation for Vtiger 6.1".