Pontoon: Update Dutch (nl) localization of MDN
Pontoon: Update Dutch (nl) localization of MDN

Localization authors:
- Ton <tonnes.mb@gmail.com>

SphinxKnight/kuma,a2sheppy/kuma,jwhitlock/kuma,SphinxKnight/kuma,Elchi3/kuma,Elchi3/kuma,Elchi3/kuma,a2sheppy/kuma,SphinxKnight/kuma,a2sheppy/kuma,SphinxKnight/kuma,a2sheppy/kuma,SphinxKnight/kuma,mozilla/kuma,escattone/kuma,mozilla/kuma,mozilla/kuma,a2sheppy/kuma,mozilla/kuma,escattone/kuma,jwhitlock/kuma,jwhitlock/kuma,escattone/kuma,Elchi3/kuma,jwhitlock/kuma,mozilla/kuma,Elchi3/kuma,SphinxKnight/kuma,jwhitlock/kuma