Added the underscore node_module.

node_modules/underscore/modules/_executeBound.js

@@ -0,0 +1,13 @@
+import baseCreate from './_baseCreate.js';
+import isObject from './isObject.js';
+
+// Internal function to execute `sourceFunc` bound to `context` with optional
+// `args`. Determines whether to execute a function as a constructor or as a
+// normal function.
+export default function executeBound(sourceFunc, boundFunc, context, callingContext, args) {
+  if (!(callingContext instanceof boundFunc)) return sourceFunc.apply(context, args);
+  var self = baseCreate(sourceFunc.prototype);
+  var result = sourceFunc.apply(self, args);
+  if (isObject(result)) return result;
+  return self;
+}