Added the Dutch translation for Fulcrum

This is a quick translation from English to Dutch for fulcrum
Added Devise Dutch translation

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

Thanks to @Daan-
Merge branch 'add_dutch_lang' of https://github.com/davidakachaos/fulcrum into davidakachaos-add_dutch_lang
Update JS translations with NL strings.