Italian translation

Hello,

I love PunBB. I needed 1.4 it in italian. On the web I found a very useful translation of an old versions plus another one for FluxBB (I think). With the help of another french translation, by adding a few files and words I came up with this:

https://github.com/dnaxxx/PunBB-ita

It's not complete (it's 95% translated) but it's usable.