GUI -- Update to memento format.

Change-Id: I99c579668b17014d4cdceb9ce5898c4ed49c5be4
diff --git a/web/gui/src/main/webapp/topo2.js b/web/gui/src/main/webapp/topo2.js
index 701f914..86aca72 100644
--- a/web/gui/src/main/webapp/topo2.js
+++ b/web/gui/src/main/webapp/topo2.js
@@ -1154,16 +1154,18 @@
             d.fixed = true;
             d3.select(self).classed('fixed', true);
             if (config.useLiveData) {
-                tellServerCoords(d);
+                sendUpdateMeta(d);
             }
         }
 
-        function tellServerCoords(d) {
+        function sendUpdateMeta(d) {
             sendMessage('updateMeta', {
                 id: d.id,
                 'class': d.class,
-                x: Math.floor(d.x),
-                y: Math.floor(d.y)
+                'memento': {
+                    x: Math.floor(d.x),
+                    y: Math.floor(d.y)
+                }
             });
         }