Added the underscore node_module.

node_modules/underscore/modules/functions.js

@@ -0,0 +1,10 @@
+import isFunction from './isFunction.js';
+
+// Return a sorted list of the function names available on the object.
+export default function functions(obj) {
+  var names = [];
+  for (var key in obj) {
+    if (isFunction(obj[key])) names.push(key);
+  }
+  return names.sort();
+}