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-fr.js

@@ -0,0 +1,18 @@
+// Spectrum Colorpicker
+// French (fr) localization
+// https://github.com/bgrins/spectrum
+
+(function ( $ ) {
+
+    var localization = $.spectrum.localization["fr"] = {
+        cancelText: "Annuler",
+        chooseText: "Valider",
+        clearText: "Effacer couleur sélectionnée",
+        noColorSelectedText: "Aucune couleur sélectionnée",
+        togglePaletteMoreText: "Plus",
+        togglePaletteLessText: "Moins"
+    };
+
+    $.extend($.fn.spectrum.defaults, localization);
+
+})( jQuery );