new classes based on json descriptor

files/web/html/index.html

@@ -13,8 +13,8 @@
     This dashboard shows the local Matt-Cloud system stats.<p>
   </div>
   <div class="container">
-    <h2>System Stats</h2>
-    <div id="host_stats" class="column">Connecting…</div>
+    <h2>Live System Metrics</h2>
+    <div id="host_metrics" class="column">Connecting…</div>
   </div>
 
   <!--