GUI -- Created NavService and implemented simple navigation (click on the bird!)

Change-Id: I2bda5a3a1b279167194a84564408760eebcb59fd
diff --git a/web/gui/src/main/webapp/app/fw/mast/mast.css b/web/gui/src/main/webapp/app/fw/mast/mast.css
index 9a68e0a..0722f6d 100644
--- a/web/gui/src/main/webapp/app/fw/mast/mast.css
+++ b/web/gui/src/main/webapp/app/fw/mast/mast.css
@@ -39,6 +39,12 @@
     height: 38px;
     padding-left: 8px;
     padding-right: 8px;
+    cursor: pointer;
+}
+
+#mast img.logo:hover {
+    /* need something better */
+    /*background-color: #888;*/
 }
 
 #mast .title {
diff --git a/web/gui/src/main/webapp/app/fw/mast/mast.html b/web/gui/src/main/webapp/app/fw/mast/mast.html
index dc086e9..e10d6ca 100644
--- a/web/gui/src/main/webapp/app/fw/mast/mast.html
+++ b/web/gui/src/main/webapp/app/fw/mast/mast.html
@@ -1,3 +1,3 @@
 <!-- Masthead partial HTML -->
-<img class="logo" src="../data/img/onos-logo.png">
-<span class="title">Open Network Operating System</span>
\ No newline at end of file
+<img class="logo" src="../data/img/onos-logo.png" ng-click="mastCtrl.toggleNav()">
+<span class="title">Open Network Operating System</span>
diff --git a/web/gui/src/main/webapp/app/fw/mast/mast.js b/web/gui/src/main/webapp/app/fw/mast/mast.js
index b8b02b4..3705d89 100644
--- a/web/gui/src/main/webapp/app/fw/mast/mast.js
+++ b/web/gui/src/main/webapp/app/fw/mast/mast.js
@@ -22,14 +22,22 @@
 (function () {
     'use strict';
 
-    angular.module('onosMast', [])
-        .controller('MastCtrl', ['$log', function (_$log_) {
-            var $log = _$log_,
-                self = this;
+    var $log;
+
+    angular.module('onosMast', ['onosNav'])
+        .controller('MastCtrl', ['$log', 'NavService', function (_$log_, ns) {
+            var self = this;
+
+            $log = _$log_;
 
             // initialize mast controller here...
             self.radio = null;
 
+            // delegate to NavService
+            self.toggleNav = function () {
+                ns.toggleNav();
+            };
+
             $log.log('MastCtrl has been created');
         }]);