fix 404

Author: Niklas Buschmann

404.html

@@ -1,9 +1,11 @@
 ---
 permalink: /404.html
+title: "404: Page not found"
 layout: default
+sitemap: false
 ---
 
 <article>
-  <h1>404</h1>
-  <p>Page not found.</p>
+  <header><h1>404</h1></header>
+  <p>Page not found</p>
 </article>

_layouts/default.html

@@ -26,7 +26,7 @@
   {% unless site.navigation or site.external %}
     <nav>
     {% for page in site.pages %}
-      {% if page.title %}
+      {% if page.title and page.sitemap != false %}
         <a href="{{ page.url | relative_url }}">{{ page.title }}</a>
       {% endif %}
     {% endfor %}