[ONOS-3642] Add GUI Meter View

This implements the web GUI meter view.
Current implementation uses the group table icon for meter,
and the revised meter icon will be updated in following commit.
See ONOS-3645 for detail.

Change-Id: Iaa2e673ef83024135d757a2aaec1c31a87263217
diff --git a/web/gui/src/main/webapp/app/view/flow/flow.html b/web/gui/src/main/webapp/app/view/flow/flow.html
index f7142d3..374da0b 100644
--- a/web/gui/src/main/webapp/app/view/flow/flow.html
+++ b/web/gui/src/main/webapp/app/view/flow/flow.html
@@ -30,6 +30,11 @@
                  icon icon-id="groupTable" icon-size="36"
                  tooltip tt-msg="groupTip"
                  ng-click="nav('group')"></div>
+
+            <div class="active"
+                 icon icon-id="meterTable" icon-size="36"
+                 tooltip tt-msg="meterTip"
+                 ng-click="nav('meter')"></div>
         </div>
     </div>
 
diff --git a/web/gui/src/main/webapp/app/view/flow/flow.js b/web/gui/src/main/webapp/app/view/flow/flow.js
index 7bb988a..da6ac8b 100644
--- a/web/gui/src/main/webapp/app/view/flow/flow.js
+++ b/web/gui/src/main/webapp/app/view/flow/flow.js
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 Open Networking Laboratory
+ * Copyright 2015,2016 Open Networking Laboratory
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -40,6 +40,7 @@
             $scope.deviceTip = 'Show device table';
             $scope.portTip = 'Show port view for this device';
             $scope.groupTip = 'Show group view for this device';
+            $scope.meterTip = 'Show meter view for selected device';
 
             params = $location.search();
             if (params.hasOwnProperty('devId')) {