[Xfce-i18n] Updated Dutch Translation

[Jasper Huijsmans]

Vincent schreef:
> Btw, for Terminal I used "opdrachtprompt" as in Windows, but I saw that 
> in the xfce-utils thing it just said Terminal. Not sure which is 
> correct. 

Not sure either. I think I would go for Terminal still...

> I also wasn't sure about Desktop Environment ;)

Either we can keep it (it's a rather common computer term I think) or we 
could use something like 'Werkomgeving', which I believe GNOME is using 
as well.

	Jasper