Added the underscore node_module.

node_modules/underscore/modules/rest.js

@@ -0,0 +1,8 @@
+import { slice } from './_setup.js';
+
+// Returns everything but the first entry of the `array`. Especially useful on
+// the `arguments` object. Passing an **n** will return the rest N values in the
+// `array`.
+export default function rest(array, n, guard) {
+  return slice.call(array, n == null || guard ? 1 : n);
+}