LnF updates to navigation menu.

Change-Id: I8dce2d5feebcf65143b1c0b4eee8b298a68995e0
(cherry picked from commit c0e282b)
diff --git a/web/gui/src/main/webapp/index.html b/web/gui/src/main/webapp/index.html
index de42a8e..e4fa6e2 100644
--- a/web/gui/src/main/webapp/index.html
+++ b/web/gui/src/main/webapp/index.html
@@ -24,6 +24,9 @@
     <meta name="apple-mobile-web-app-status-bar-style" content="black">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
+    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,300,700'
+          rel='stylesheet' type='text/css'>
+
     <title>ONOS</title>
 
     <!-- Third party library code included here -->