[Xfce-i18n] add catalan credits

[Benedikt Meurer]

Pau Rul·lan Ferragut wrote:
>>>My team-mate has translated Terminal into catalan, I have already made
>>>the commit of the .po but I would like to have him apear in the
>>>credits.
> 
>>Done. Note that the special string "translator-credits" in the .po
>>should be "translated" as the list of translators for this language. The
>>list will then appear in the about dialog when running in the given locale.
> 
> So the only thing that you as developar has to do is to put him in the
> "THANKS" file, is not it? Well, only if you want to thank him :D

Right. As said, the credits in the about dialog are added implictly by
the translator. ;-)

>       greetings,
>       paurullan

Benedikt