Add Flattr button to Sphinx-generated HTML docs

doc/_templates/donations.html

@@ -0,0 +1,7 @@
+<h3>Donate</h3>
+<ul>
+  <li>
+    <a class="FlattrButton" style="display:none;" rev="flattr;button:compact;" href="http://github.com/earl/beanstalkc"></a>
+    <noscript><a href="http://flattr.com/thing/156111/beanstalkc" target="_blank"><img src="http://api.flattr.com/button/flattr-badge-large.png" alt="Flattr this" title="Flattr this" border="0" /></a></noscript>
+  </li>
+</ul>

doc/_templates/layout.html

@@ -0,0 +1,16 @@
+{% extends "!layout.html" %}
+
+{% block extrahead %}
+    <script type="text/javascript">
+      /* <![CDATA[ */
+      (function() {
+        var s = document.createElement('script'), t = document.getElementsByTagName('script')[0];
+        s.type = 'text/javascript';
+        s.async = true;
+        s.src = 'http://api.flattr.com/js/0.6/load.js?mode=auto';
+        t.parentNode.insertBefore(s, t);
+      })();
+      /* ]]> */
+    </script>
+    {{ super() }}
+{% endblock %}

doc/conf.py

@@ -33,6 +33,7 @@
         'relations.html',
         'sourcelink.html',
         'searchbox.html',
+        'donations.html',
     ]
 }