site: make resources editable

docs/_layouts/page.html

@@ -6,6 +6,11 @@ layout: default
   <div class="grid">
     <div class="unit whole">
       <article>
+        {%- if page.permalink contains "resources" %}
+        <div class="improve right hide-on-mobiles">
+          <a data-proofer-ignore href="https://github.com/jekyll/jekyll/edit/master/docs/{{ page.path }}"><i class="fa fa-pencil"></i> &nbsp;Improve this page</a>
+        </div>
+        {% endif -%}
         <h1>{{ page.title }}</h1>
         {{ content }}
       </article>