Provide usernames without further data as more human-readable numbers

static/debug.html

@@ -73,7 +73,7 @@ var addMessage = function(message) {
   var messageDiv = document.createElement('div');
   messageDiv.innerHTML = (
     (new Date(message['created'] * 1000)).toString() +
-    ' <' + message['sender'] + '> ' +
+    ' <????-' + (Math.abs(message['sender'].hashCode()) % 10000) + '> ' +
     message['message']
   );
   messages.appendChild(messageDiv);