Added the underscore node_module.

node_modules/underscore/modules/index-default.js

@@ -0,0 +1,27 @@
+// Default Export
+// ==============
+// In this module, we mix our bundled exports into the `_` object and export
+// the result. This is analogous to setting `module.exports = _` in CommonJS.
+// Hence, this module is also the entry point of our UMD bundle and the package
+// entry point for CommonJS and AMD users. In other words, this is (the source
+// of) the module you are interfacing with when you do any of the following:
+//
+// ```js
+// // CommonJS
+// var _ = require('underscore');
+//
+// // AMD
+// define(['underscore'], function(_) {...});
+//
+// // UMD in the browser
+// // _ is available as a global variable
+// ```
+import * as allExports from './index.js';
+import { mixin } from './index.js';
+
+// Add all of the Underscore functions to the wrapper object.
+var _ = mixin(allExports);
+// Legacy Node.js API.
+_._ = _;
+// Export the Underscore API.
+export default _;