Added Devise Dutch translation
Added Devise Dutch translation

Not my own; see https://gist.github.com/Daan-/1559647

Thanks to @Daan-
KentFujii/fulcrum,nh-platform/demo-fulcrum,KentFujii/fulcrum,fulcrum-agile/fulcrum,ipmobiletech/fulcrum,MikeRuby/fulcrumapp,fulcrum-agile/fulcrum,HenryYan2012/fulcrum,Codeminer42/cm42-central,PedroFelipe/cm42-central,jimbeaudoin/agile-tracker,jimbeaudoin/agile-tracker,privatt/privatt-agile-tracker,jimbeaudoin/agile-tracker,DrTom/fulcrum,Codeminer42/cm42-central,Aupajo/fulcrum,DrTom/fulcrum,nh-platform/demo-fulcrum,KentFujii/fulcrum,Aupajo/fulcrum,HenryYan2012/fulcrum,nh-platform/demo-fulcrum,PedroFelipe/cm42-central,privatt/privatt-agile-tracker,Codeminer42/cm42-central,privatt/privatt-agile-tracker,PedroFelipe/cm42-central,fulcrum-agile/fulcrum,Aupajo/fulcrum,ipmobiletech/fulcrum,MikeRuby/fulcrumapp,ipmobiletech/fulcrum,HenryYan2012/fulcrum,DrTom/fulcrum