show timezone on stats page (fixes #64)

web/templates/stats.html.ep

@@ -26,7 +26,7 @@
   </tr>
   <tr>
     <th>It is currently</th>
-    <td><%= time_to_datetimestr($now->epoch) %></td>
+    <td><span title="All times are UTC"><%= time_to_datetimestr($now->epoch) %> UTC</span></td>
     % if (!$channel) {
       <th>Channels</th>
       <td>