add site guide to sidebar

files/templates/sidebar_rDrama.html

@@ -42,7 +42,8 @@
 	{% if sub and sub.sidebar_html %}
 		<div class="mb-4">{{sub.sidebar_html|safe}}</div>
 	{% endif %}
-		
+
+	<a class="btn btn-primary btn-block mb-3" href="/post/151246/rdrama-featureset">SITE GUIDE</a>
 	<a class="btn btn-primary btn-block mb-3" href="/ping_groups">PING GROUPS</a>
 	<a id="sidebar--directory--btn" class="btn btn-primary btn-block mb-3" href="/directory">
 		<span id="sidebar--directory--head">DIRECTORY</span>