Display event's timestamp in local time zone.

In the same fashion as the Time Line chart does.

Closes #74

kibana/dashboards/cluster_pulse.json

@@ -56,7 +56,8 @@
     }
   },
   "rows": [
-    { "title": "Cluster Summary",
+    {
+      "title": "Cluster Summary",
       "height": "75px",
       "editable": true,
       "panels": [
@@ -173,6 +174,8 @@
           "trimFactor": 300,
           "normTimes": true,
           "spyable": true,
+          "localTime": true,
+          "timeField": "@timestamp",
           "title": "Cluster events"
         },
         {