Error Messages - UI display (#360)

* backend ui work

* instll block

* easy mvp

* Small changes.

webui/src/ray-app.html

@@ -1,13 +1,3 @@
-<!--
-@license
-Copyright (c) 2016 The Polymer Project Authors. All rights reserved.
-This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
-The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
-The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
-Code distributed by Google as part of the polymer project is also
-subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
--->
-
 <link rel="import" href="../bower_components/polymer/polymer.html">
 <link rel="import" href="../bower_components/app-layout/app-drawer/app-drawer.html">
 <link rel="import" href="../bower_components/app-layout/app-drawer-layout/app-drawer-layout.html">
@@ -75,6 +65,7 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
           <a name="objects" href="/objects">Objects</a>
           <a name="tasks" href="/tasks">Tasks</a>
           <a name="events" href="/events">Events</a>
+          <a name="errors" href="/errors">Errors</a>
           <a name="timeline" href="/timeline">Timeline</a>
           <a name="recent-tasks" href="/recent-tasks">Recent Tasks</a>
         </iron-selector>
@@ -100,6 +91,7 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
           <ray-objects name="objects"></ray-objects>
           <ray-tasks name="tasks"></ray-tasks>
           <ray-events name="events"></ray-events>
+          <ray-errors name="errors"></ray-errors>
           <ray-timeline name="timeline"></ray-timeline>
           <ray-recent-tasks name="recent-tasks"></ray-recent-tasks>
           <ray-view404 name="view404"></ray-view404>