Get off off rails-assets

Just moving the things we currently use (and should drop in the ASAP) to vendor/assets

vendor/assets/javascripts/spectrum/i18n/jquery.spectrum-nl.js

@@ -0,0 +1,17 @@
+// Spectrum Colorpicker
+// Dutch (nl-nl) localization
+// https://github.com/bgrins/spectrum
+
+(function ( $ ) {
+
+    var localization = $.spectrum.localization["nl-nl"] = {
+        cancelText: "Annuleer",
+        chooseText: "Kies",
+        clearText: "Wis kleur selectie",
+        togglePaletteMoreText: 'Meer',
+        togglePaletteLessText: 'Minder'
+    };
+
+    $.extend($.fn.spectrum.defaults, localization);
+
+})( jQuery );