Update nl-NL.coffee (#3829)
Update nl-NL.coffee (#3829)

translated some lines in the signup section.
VilkkuV/codecombat,VilkkuV/codecombat,kidaa/codecombat,fabichoi/codecombat,kidaa/codecombat,fabichoi/codecombat,Zerrien/codecombat,codecombat/codecombat,VilkkuV/codecombat,jeremyprice/codecombat,javatlacati/codecombat,kidaa/codecombat,codecombat/codecombat,jeremiahyan/codecombat,fabichoi/codecombat,jeremiahyan/codecombat,codecombat/codecombat,icodegame/codecombat,javatlacati/codecombat,probil/codecombat,javatlacati/codecombat,fabichoi/codecombat,jeremyprice/codecombat,jeremyprice/codecombat,icodegame/codecombat,jeremyprice/codecombat,codecombat/codecombat,probil/codecombat,VilkkuV/codecombat,javatlacati/codecombat,kidaa/codecombat,Zerrien/codecombat,probil/codecombat,jeremiahyan/codecombat,javatlacati/codecombat,jeremiahyan/codecombat,Zerrien/codecombat,icodegame/codecombat,probil/codecombat,codecombat/codecombat,icodegame/codecombat,Zerrien/codecombat