ONOS-4971: Synthetic Link Data -- WIP, merge anyway

- created temp Topology2 View (topoX) to "process" and display topology data.
- made root layout parent of itself (just like /.. = /) to simplify layout hierarchy operations.
- added nodeType property to JSON rep of regions/devices/hosts.
- augmented peers to include devices.
- added skeleton topo2NavRegion event.

Change-Id: I8219125d7dfe33d211350ae27111a3d9de6eb4ca
diff --git a/web/gui/src/main/webapp/index.html b/web/gui/src/main/webapp/index.html
index 22865a1..c95597b 100644
--- a/web/gui/src/main/webapp/index.html
+++ b/web/gui/src/main/webapp/index.html
@@ -133,6 +133,12 @@
     <link rel="stylesheet" href="app/view/topo2/topo2.css">
     <link rel="stylesheet" href="app/view/topo2/topo2-theme.css">
 
+    <script src="app/view/topoX/topoX.js"></script>
+    <script src="app/view/topoX/topoXEvent.js"></script>
+    <script src="app/view/topoX/topoXForce.js"></script>
+    <link rel="stylesheet" href="app/view/topoX/topoX.css">
+    <link rel="stylesheet" href="app/view/topoX/topoX-theme.css">
+
     <!-- Builtin views javascript. -->
     <script src="app/view/topo/topo.js"></script>
     <script src="app/view/topo/topoD3.js"></script>