Cherry pick from https://review.openstack.org/#/c/38375

Fixes to install guide and basic install guide.

Fix bug 1199133

Change-Id: I413251be6c1b1204fb76d8daa8d0218854a1ceca

doc/src/docbkx/common/dashboard-install.xml

@@ -36,6 +36,9 @@
                 platform. </para>
         </listitem>
     </itemizedlist>
+    <para>For more information about how to deploy the dashboard, see <link
+            xlink:href="http://docs.openstack.org/developer/horizon/topics/deployment.html"
+            >Deploying Horizon</link>.</para>
     <procedure>
         <title>To install the dashboard:</title>
         <step>