Added the underscore node_module.

node_modules/underscore/amd/_executeBound.js

@@ -0,0 +1,16 @@
+define(['./_baseCreate', './isObject'], function (_baseCreate, isObject) {
+
+  // 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.
+  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;
+  }
+
+  return executeBound;
+
+});