added follow @qos_ch link

slf4j-site/src/site/pages/css/site.css

@@ -386,4 +386,26 @@ td:hover .anchor,
 dt:hover .anchor {
   display: inline-block;
   text-decoration: none;
-}
+}
+
+
+/* ------------ twitter botton ------- */
+.twitter_button {
+  vertical-align: text-bottom;
+  padding-top: 3px;
+  padding-right: 16px;
+  float: left;
+  height: 18px;
+  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.5);
+  white-space: nowrap;
+  background-color: white;
+  background-image: -moz-linear-gradient(top, #ffffff, #dedede);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#ffffff), to(#dedede));
+  background-image: -ms-linear-gradient(top, #ffffff, #dedede);
+  background-image: linear-gradient(top, #ffffff, #dedede);
+  background-image: -o-linear-gradient(top, #ffffff, #dedede);
+  border: #CCC solid 1px;
+  -webkit-border-radius: 3px;
+     -moz-border-radius: 3px;
+          border-radius: 3px;
+}

slf4j-site/src/site/pages/templates/footer.js

@@ -4,6 +4,14 @@ document.write('<table class="footer" border="0">')
 document.write('<tr>')
 
 document.write('  <td valign="top" align="left">Copyright &copy; 2004-2012  <a href="http://www.qos.ch/">QOS.ch</a></td>')
+
+document.write('  <td>');
+document.write('    <a class="twitter_button" href="http://twitter.com/qos_ch">');
+document.write('    <img style="float:left;" src="images/twitter-bird-light-bgs.png" height="16" alt=""/> Follow @qos_ch');
+document.write('    </a>');
+document.write('  </td>');
+
+
 document.write('</tr>')
 
 AAT = '@'