added link to lecture notes on bittorrent introduction

docs/index.html

@@ -27,6 +27,10 @@
 <li><a class="reference" href="http://libtorrent-ruby.rubyforge.org/">ruby bindings</a></li>
 <li><a class="reference" href="http://code.google.com/p/python-libtorrent/">python bindings</a></li>
 </ul>
+<hr class="docutils" />
+<ul class="simple">
+<li><a class="reference" href="bittorrent.pdf">Introduction, slides</a></li>
+</ul>
 </div>
 <div id="libraryBody"><div class="section" id="libtorrent">
 <h1><a name="libtorrent">libtorrent</a></h1>

docs/index.rst

@@ -19,6 +19,10 @@
 * `ruby bindings`_
 * `python bindings`_
 
+--------
+
+* `Introduction, slides`_
+
 .. raw:: html
 
    </div>
@@ -44,6 +48,8 @@ libtorrent
 .. _`ruby bindings`: http://libtorrent-ruby.rubyforge.org/
 .. _`python bindings`: http://code.google.com/p/python-libtorrent/
 
+.. _`Introduction, slides`: bittorrent.pdf
+
 libtorrent is a C++ library that aims to be a good alternative to all the
 other bittorrent implementations around. It is a
 library and not a full featured client, although it comes with a working