GUI -- augmented hash parsing to include flags (after '?'), which are passed into view callbacks as a boolean map.
 - moved event test files into sub directories
 - prepared topo2.js for scenario choice via hash context and 'local' (and 'debug') flag.
 - added 'simple' scenario: 2 switches, 1 link, and 2 hosts.
 - augmented topo event dispatch for yet-to-be-implemented event handlers.
 - implemented addHost() event handler.

Change-Id: I06b032684fd4d5f85262d13d58ad10edae23b3ed
diff --git a/web/gui/src/main/webapp/index2.html b/web/gui/src/main/webapp/index2.html
index 6168271..9688522 100644
--- a/web/gui/src/main/webapp/index2.html
+++ b/web/gui/src/main/webapp/index2.html
@@ -90,6 +90,7 @@
     <script src="sampleAlt2.js"></script>
     <script src="sampleRadio.js"></script>
     <script src="sampleKeys.js"></script>
+    <script src="sampleHash.js"></script>
 
     <!-- Contributed (application) views injected here -->
     <!-- TODO: replace with template marker and inject refs server-side -->