ONOS-2328 GUI -- Started work on seeing multiple links between devices on the topology view. Device links are now grouped based on what device they are between. Also minor bug fixes and investigations into other bugs. WIP.

Change-Id: I444f016268efc5c489ba6ad0282d0f7827fff462
diff --git a/web/gui/src/main/webapp/app/view/topo/topoLink.js b/web/gui/src/main/webapp/app/view/topo/topoLink.js
index 9cd49dc..834f024 100644
--- a/web/gui/src/main/webapp/app/view/topo/topoLink.js
+++ b/web/gui/src/main/webapp/app/view/topo/topoLink.js
@@ -104,6 +104,7 @@
             return {x:x4, y:y4};
         }
 
+        // FIXME: x and y position calculated here, use link.position
         function lineSeg(d) {
             return {
                 x1: d.source.x,
@@ -200,6 +201,7 @@
         td3.applyPortLabels(data, api.portLabelG());
     }
 
+    // FIXME: x and y position calculated here somewhere
     function locatePortLabel(link, src) {
         var near = src ? 'source' : 'target',
             far = src ? 'target' : 'source',