Added the underscore node_module.

node_modules/underscore/amd/set.js

@@ -0,0 +1,15 @@
+define(['./isArray', './isObject', './_set'], function (isArray, isObject, _set) {
+
+  // set the value in given path
+  function set (obj, path, value) {
+    if (!isObject(obj) || !isArray(path)) return obj;
+    if (path.length === 0) return obj;
+
+    _set(obj, path, value);
+
+    return obj;
+  }
+
+  return set;
+
+});