GUI -- Added updateDevice event handling.
 - Display offline devices as grey.
 - Tracing web socket messages (for now, in console; in future, to trace view).
 - Captured sample events for use with test scenarios - both from and to the server.
 - Added description to scenario file.

Change-Id: I7825b32d63496ebea2ab5789519fb0c6af6c5257
diff --git a/web/gui/src/main/webapp/json/ev/_capture/tx/updateMeta_ex1.json b/web/gui/src/main/webapp/json/ev/_capture/tx/updateMeta_ex1.json
new file mode 100644
index 0000000..c04727e
--- /dev/null
+++ b/web/gui/src/main/webapp/json/ev/_capture/tx/updateMeta_ex1.json
@@ -0,0 +1,10 @@
+{
+  "event": "updateMeta",
+  "sid": 11,
+  "payload": {
+    "id": "62:4F:65:BF:FF:B3/-1",
+    "class": "host",
+    "x": 197,
+    "y": 177
+  }
+}