Italian translation

[Vincenzo Reale]

Michael Sweet wrote:
> You can start with the current stable release; the differences with
> 1.3.x are minimal (for translations, anyways).  Then just follow the
> directions in "doc/help/translation.html".

Italian translation almost ready, but I need help with two buttons.
I don't understand how to create button-sort-ascending.gif and
button-sort-descending.gif.
Thanks.

Cheers,
Vincenzo