Add list of singleton pamraeters to custom, refine letsencrypt json

Templates/partial.html.ep.tem

@@ -7,9 +7,6 @@
       SelectInput();
     };
   </script>
-     <h2>
-     %= l('${prefix} Hello ${route}');
-     </h2>
     % my $btn = l('APPLY');
     %= form_for "${PackageName}d" => (method => 'POST') => begin
 
@@ -18,4 +15,4 @@
 		%# Inputs etc in here.
 		%# Probably finally by a submit.
 	%end    
-</div>
+</div>