Adding 7.0 as latest version

Author: alexmolev

layouts/partials/version.html

@@ -3,7 +3,8 @@
         var newVersion = this.options[this.selectedIndex].value;
         window.location = '/' + newVersion + '{{.Page.RelPermalink}}';
     ">
-        <option selected value="staging/dev">Staging</option>
+        <option selected value="latest">7.0 (Latest)</option>
+        <option value="6.4.0">6.4.0</option>
         <option value="6.3.0">6.3.0</option>
         <option value="6.2.0">6.2.0</option>
         <option value="6.1.0">6.1.0</option>