Update menu_nl.lang
Update menu_nl.lang

Done. Should be checked by another native speaker, in  order to prevent stupid mistakes.
mertserezli/Terasology,MovingBlocks/Terasology,kartikey0303/Terasology,Halamix2/Terasology,MovingBlocks/Terasology,Nanoware/Terasology,kaen/Terasology,mertserezli/Terasology,DPirate/Terasology,dannyzhou98/Terasology,AWildBeard/Terasology,dannyzhou98/Terasology,Vizaxo/Terasology,Vizaxo/Terasology,AWildBeard/Terasology,Nanoware/Terasology,MovingBlocks/Terasology,Malanius/Terasology,Halamix2/Terasology,kaen/Terasology,Nanoware/Terasology,DPirate/Terasology,kartikey0303/Terasology,Malanius/Terasology