Add direct link to file at HEAD and edit mode

.gliki/hbs/__default__.hbs

@@ -11,7 +11,7 @@
     <header><a href="/">HGPA</a></header>
     <article>{{{ markdown }}}</article>
     <div class="gliki-metadata">
-      Filename:  {{filename}}<br>
+      Filename: <a href="https://github.com/hparra/hgpa/blob/master/{{filename}}">{{filename}}</a> <a href="https://github.com/hparra/hgpa/edit/master/{{filename}}">(Edit)</a><br>
       Modified: {{modified_by.author.date}} (<a href="https://github.com/hparra/hgpa/commit/{{modified_by.sha}}">{{modified_by.sha}}</a>)<br>
       Created: {{created_by.author.date}} (<a href="https://github.com/hparra/hgpa/commit/{{created_by.sha}}">{{created_by.sha}}</a>)
     </div>