add display name to stats debug info

modules/settings/Settings.js

 }
 
 var Settings = {
+
+    /**
+     * Sets the local user display name and saves it to local storage
+     *
+     * @param newDisplayName the new display name for the local user
+     * @returns {string} the display name we just set
+     */
     setDisplayName: function (newDisplayName) {
         displayName = newDisplayName;
         window.localStorage.displayname = displayName;
         return displayName;
     },
+
+    /**
+     * Returns the currently used by the user
+     * @returns {string} currently valid user display name.
+     */
+    getDisplayName: function () {
+        return displayName;
+    },
+
     setEmail: function (newEmail) {
         email = newEmail;
         window.localStorage.email = newEmail;
         return email;
     },
+
     getSettings: function () {
         return {
             email: email,

modules/statistics/CallStats.js

 /* global config, $, APP, Strophe, callstats */
+
+var Settings = require('../settings/Settings');
 var jsSHA = require('jssha');
 var io = require('socket.io-client');
 var callStats = null;
 
         this.userID =  APP.xmpp.myResource();
 
+        //use whatever the user said to facilitate debugging
+        if(Settings.getDisplayName())
+            this.userID = Settings.getDisplayName();
+
         var location = window.location;
         this.confID = location.hostname + location.pathname;