[QBZR/RFC] Add unidiff format to diff dialog

[Goffredo Baroncelli]

I worked a bit on my patch:
- now the _() function should translate correctly
- the unidiff diff should be english only (for the moment)

I didn't touched the po/po.* files, because I don't know how gettext work.

Please Alexander give me a feedback. 


> -- 
> gpg key@ keyserver.linux.it: Goffredo Baroncelli (ghigo) 
<kreijack at inwind.it>
> Key fingerprint = CE3C 7E01 6782 30A3 5B87  87C0 BB86 505C 6B2A CFF9
> 
> 



-- 
gpg key@ keyserver.linux.it: Goffredo Baroncelli (ghigo) <kreijack at inwind.it>
Key fingerprint = CE3C 7E01 6782 30A3 5B87  87C0 BB86 505C 6B2A CFF9
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