GUI -- Test events: unpinned the first node; increased a few link widths.
 - added alerts pane to framework.
 - added library registration mechanism to framework.
 - created d3Utils library
 - reimplemented drag behavior of nodes.

Change-Id: I501f4ab6eded8393948cede903573580599258b1
diff --git a/web/gui/src/main/webapp/json/eventTest_11.json b/web/gui/src/main/webapp/json/eventTest_11.json
index e907444..3b361d5 100644
--- a/web/gui/src/main/webapp/json/eventTest_11.json
+++ b/web/gui/src/main/webapp/json/eventTest_11.json
@@ -10,8 +10,8 @@
       "?"
     ],
     "metaUi": {
-      "x": 832,
-      "y": 223
+      "Zx": 832,
+      "Zy": 223
     }
   }
 }