Add a few more useful rels to the layout's links

templates/default-layout-wrapper.hamlet

@@ -8,6 +8,7 @@ $doctype 5
     <title>#{pageTitle pc}
     $maybe route <- mcurrentRoute
       <link rel="canonical" href=@{route}>
+    <link rel="sitemap" href=@{SitemapR}>
 
     <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.css" integrity="sha384-/Y6pD6FV/Vv2HJnA6t+vslU6fwYXjCFtcEpHbNJ0lyAFsXTsjBbfaDjzALeQsN6M" crossorigin="anonymous">
     <script src="https://use.fontawesome.com/4fbab4ae27.js">

templates/default-layout.hamlet

@@ -1,7 +1,7 @@
 <header>
     <nav .navbar .navbar-expand-lg .navbar-dark.bg-dark>
         $maybe title <- appTitle $ appSettings master
-            <a .navbar-brand href=@{HomeR}>#{title}
+            <a .navbar-brand rel="home" href=@{HomeR}>#{title}
         <button type="button" .navbar-toggler data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar" aria-label="Toggle navigation">
             <span .navbar-toggler-icon>
 
@@ -31,4 +31,4 @@
     $with Package { packageName = n, packageVersion = v, packageRepository = r } <- package
         <p>
             powered by #
-            <a href="#{repositoryUrl r}/tree/v#{v}">#{n} #{v}
+            <a rel="code-repository" href="#{repositoryUrl r}/tree/v#{v}">#{n} #{v}