Add Center Radar theme to the welcome page

Author: adamschwartz

docs/welcome/index.html

@@ -494,6 +494,10 @@ <h2>Themes</h2>
                             name: 'loading-bar',
                             title: 'Loading Bar',
                             author: 'gavJackson'
+                        }, {
+                            name: 'center-radar',
+                            title: 'Center Radar',
+                            author: 'kennyglenn'
                         }];
 
                         var init = function() {