Italian translation finally added and updated.

I have completed the italian translaton of all the stringtable.xml (s).
(With the exception of the AGM_RealisticNames , already done by
@11RDP-LoupVert in #1063, but not merged yet)

According to what told in #1065 by @KoffeinFlummi i also updated my fork.

Hope that this will helps :)
Have a nice day guys!