GUI -- augmented hash parsing to include flags (after '?'), which are passed into view callbacks as a boolean map.
 - moved event test files into sub directories
 - prepared topo2.js for scenario choice via hash context and 'local' (and 'debug') flag.
 - added 'simple' scenario: 2 switches, 1 link, and 2 hosts.
 - augmented topo event dispatch for yet-to-be-implemented event handlers.
 - implemented addHost() event handler.

Change-Id: I06b032684fd4d5f85262d13d58ad10edae23b3ed
diff --git a/web/gui/src/main/webapp/json/ev/simple/ev_4_onos.json b/web/gui/src/main/webapp/json/ev/simple/ev_4_onos.json
new file mode 100644
index 0000000..51fdb8c
--- /dev/null
+++ b/web/gui/src/main/webapp/json/ev/simple/ev_4_onos.json
@@ -0,0 +1,16 @@
+{
+  "event": "addHost",
+  "payload": {
+    "id": "00:00:00:00:00:03/-1",
+    "cp": {
+      "device": "of:0000ffffffff0003",
+      "port": 1
+    },
+    "labels": [
+      "10.0.0.3",
+      "00:00:00:00:00:03"
+    ],
+    "metaUi": {
+    }
+  }
+}