Continuing on micro workers, and corrected some bugs

lib/vcode.js

@@ -1,7 +1,13 @@
 var hash = require('sha256');
 var secretKey = require('../private.js').microSecretKey;
 
-module.exports = function(campaignId, workerId) {
+module.exports = function(workerId, campaignId) {
+
+    if (campaignId === undefined) {
+
+        return 'mw-dummyvcode';
+
+    }
 
     return 'mw-' + hash(campaignId + workerId + secretKey);