Minor corrections to dutch translation

[routeconverter]

The dutch translation contained a few typing errors. Please find a .diff file against svn attached to this post.
Note: it is gzipped as I was not allowed to attach a straight diff to a post/thread.

Thank you, I've applied the patch. Btw, you've seen that the translation of the menus is still missing? I want to wait until the menu design has settled a bit before I ask my translators to help me.