Add calendar module.

modules/newsfeed/node_helper.js

@@ -1,3 +1,10 @@
+/* Magic Mirror
+ * Node Helper: Newsfeed
+ *
+ * By Michael Teeuw http://michaelteeuw.nl
+ * MIT Licensed.
+ */
+
 var NodeHelper = require('node_helper');
 var validUrl = require('valid-url');
 var Fetcher = require('./fetcher.js');