Pontoon: Updated Dutch (nl) localization of Thimble
Pontoon: Updated Dutch (nl) localization of Thimble

Translation authors:
- Mark Heijl <markh@babelzilla.org>

humphd/thimble.mozilla.org,humphd/thimble.mozilla.org,mozilla/thimble.mozilla.org,humphd/thimble.mozilla.org,mozilla/thimble.mozilla.org,mozilla/thimble.mozilla.org,humphd/thimble.mozilla.org,mozilla/thimble.mozilla.org