Add link home from post (#17)

Author: fu5ha

_layouts/default.html

@@ -21,7 +21,7 @@
 
       <section>
         <div id="title">
-          <h1>{{ site.title | default: site.github.repository_name }}</h1>
+          <h1><a href="https://gfx-rs.github.io/">{{ site.title | default: site.github.repository_name }}</a></h1>
           <p>{{ site.description | default: site.github.project_tagline }}</p>
           <hr>
         </div>