add Lorenzo's SMWb talk

index.html

@@ -80,6 +80,7 @@ <h2>Archive</h2>
   		<ul>
         <li>Berlin, 2013/10/16 - <a href="presentations/2013-10-erlang-factory-berlin/">Introducing OpenTechSchool and Hackership </a> as given by <a href="http://www.erlang-factory.com/conference/Berlin2013/speakers/BenjaminKampmann">Benjamin Kampmann at Erlang Factory Lite Berlin</a></li>
         <li>Cologne, 2013/10/15 - <a href="https://docs.google.com/presentation/d/1SCioo0L2zpcUobTZVOyts8unZcp8t1cmJycq1qFZJZg/edit">OTS Potpourri</a> as given by <a href="https://2013.de.pycon.org/schedule/sessions/8/">Robert Lehmann at PyConDE 2013</a></li>
+        <li>Berlin, 2013/09/23 - <a href="https://docs.google.com/presentation/d/1sjhojB3BaCyb3ItF0t3z4YSZ9oxbSmcUKcNZVHeqqHU/edit">Inside OpenTechSchool - A worldwide community for free tech education</a> as given by <a href="http://socialmediaweek.org/berlin/events/?id=101151">Lorenzo Pilia and Duana Stanley at Social Media Week</a></li>
         <li>Berlin, 2013/05/10 - <a href="presentations/the-state-of-tech-education/">The state of Tech Education</a> as given by <a href="http://berlin.codemotionworld.com/talk-page/?talk_name=new-methods-in-tech-education">Amélie Anglade and Benjamin Kampmann at Codemotion Berlin</a></li>
   			<li>Berlin, 2012/11/12 - <a href="presentations/opencurriuculum-github-for-the-win/">Opencurriculum - Github for the Win</a> as hold by <a href="http://open-strategies.de/sessions/opencurriculum-github-for-the-win">Benjamin Kampmann at Summit of New Thinking</a></li>
   	</section>