Exclude search results from robot indices (closes #120)

Change-Id: If6387bb7585afbba80743cad9cfcf8779517c6b3
diff --git a/lib/Kalamar.pm b/lib/Kalamar.pm
index 12ed96c..35c6637 100644
--- a/lib/Kalamar.pm
+++ b/lib/Kalamar.pm
@@ -276,7 +276,9 @@
   if ($self->navi->exists('settings')) {
     $r->get('/settings')->to(
       cb => sub {
-        return shift->render('settings')
+        my $c = shift;
+        $c->res->headers->header('X-Robots' => 'noindex');
+        return $c->render('settings');
       }
     )->name('settings_start');
     $r->get('/settings/:scope/:page')->to(