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/index2.html b/web/gui/src/main/webapp/index2.html
index 1ddc318..235c1d7 100644
--- a/web/gui/src/main/webapp/index2.html
+++ b/web/gui/src/main/webapp/index2.html
@@ -64,6 +64,9 @@
         <div id="overlays">
             <!-- NOTE: overlays injected here, as needed -->
         </div>
+        <div id="alerts">
+            <!-- NOTE: alert content injected here, as needed -->
+        </div>
     </div>
 
     <!-- Initialize the UI...-->
@@ -76,6 +79,9 @@
         });
     </script>
 
+    <!-- Library module files included here -->
+    <script src="d3Utils.js"></script>
+
     <!-- Framework module files included here -->
     <script src="mast2.js"></script>