[Xfce-i18n] Updating Translator-credits on the website and in xfce4-about

[Leandro Regueiro]

> Before the next release (beta2), I want to make sure the 'credits'
> page on the website and in the xfce4-about dialog are up-to-date.
>
> Because it is nearly impossible to check over 600 translation-files, I
> want to ask you to tell us when your name is missing from the CREDITS
> and we'll make sure to add them accordingly.

Could be a translation project in the credits?

Bye,
               Leandro Regueiro