Added full italian language support

[Nutpile]

The files in the list below are the only ones i touched so i'd check back on those just to make sure i didn't make a mess Makefile src/data.asm src/flash.asm src/installer.asm src/strings.asm

I also tried to keep the string lenghs as similar as possible to the original but italian is just a longer language so sometimes it just wasn't an option

either way i had a lot of fun doing this, see you next time.

[mateoconlechuga]

Thanks for translation! Added and cleaned up the makefile to make it easier in the future :)