implement topojson based map rendering
position devices based on location.lat/lng
use viewbox on topo root svg to support live scaling of map and nodes

Change-Id: I56c2b1e211ab63a694b817d04ee4bb62ac62cec4
diff --git a/web/gui/src/main/webapp/json/ev/simple/ev_2_onos.json b/web/gui/src/main/webapp/json/ev/simple/ev_2_onos.json
index 87f35d6..d12e194 100644
--- a/web/gui/src/main/webapp/json/ev/simple/ev_2_onos.json
+++ b/web/gui/src/main/webapp/json/ev/simple/ev_2_onos.json
@@ -10,9 +10,10 @@
       "sw-3",
       ""
     ],
-    "metaUi": {
-      "x": 800,
-      "y": 280
+    "location": {
+      "type": "latlng",
+      "lat": 40.7127,
+      "lng": -74.0059
     }
   }
 }