Added the underscore node_module.

node_modules/underscore/cjs/defer.js

@@ -0,0 +1,9 @@
+var partial = require('./partial.js');
+var delay = require('./delay.js');
+var underscore = require('./underscore.js');
+
+// Defers a function, scheduling it to run after the current call stack has
+// cleared.
+var defer = partial(delay, underscore, 1);
+
+module.exports = defer;