Add coffeescript back in

common/script/content/translation.js

@@ -0,0 +1,21 @@
+'use strict';
+
+require('coffee-script');
+var i18n = require('../i18n.coffee');
+
+var t = function(string, vars) {
+  var func = function(lang) {
+    if (vars == null) {
+      vars = {
+        a: 'a'
+      };
+    }
+    return i18n.t(string, vars, lang);
+  };
+
+  func.i18nLangFunc = true; // Trick to recognize this type of function
+
+  return func;
+};
+
+module.exports = t;