GUI -- First pass at TopoEventService - to encapsulate sending/receiving events from server.

Change-Id: I604d63a715f1ee25ca7ed05bacccb9eb8d65a0f4
diff --git a/web/gui/src/main/webapp/app/index.html b/web/gui/src/main/webapp/app/index.html
index beeb2d3..bad7a6c 100644
--- a/web/gui/src/main/webapp/app/index.html
+++ b/web/gui/src/main/webapp/app/index.html
@@ -73,6 +73,7 @@
     <!-- {INJECTED-JAVASCRIPT} -->
     <script src="view/sample/sample.js"></script>
     <script src="view/topo/topo.js"></script>
+    <script src="view/topo/topoEvent.js"></script>
     <script src="view/device/device.js"></script>
     <!-- TODO: inject javascript refs server-side -->