[Docs] Add a link from the example to the reference documentation.

doc-src/Gemfile.lock

@@ -14,7 +14,7 @@ GIT
 PATH
   remote: ..
   specs:
-    compass (0.11.alpha.4.30f446d)
+    compass (0.11.alpha.4.668a856)
       chunky_png (~> 0.10.3)
       sass (>= 3.1.0.alpha.50)
 

doc-src/content/stylesheets/partials/_example.scss

@@ -22,4 +22,8 @@ html.light #demo, html.dark #demo {
   .example-source { clear: both; }
 }
 
+#reference {
+  float: right;
+  margin-top: 1em;
+}
 

doc-src/layouts/partials/example.haml

@@ -1,3 +1,6 @@
+- if @item[:stylesheet] && (reference = reference_item(:stylesheet => @item[:stylesheet]))
+  #reference= link_to "Reference Documentation", reference
+
 %h1 Demo: #{@item[:title]}
 #demo= example_html