Added lazyloading pattern and explicit chapter links in tutorial.

This fixes #49.

examples/minitwit/minitwit.py

@@ -127,6 +127,7 @@ def user_timeline(username):
             follower.who_id = ? and follower.whom_id = ?''',
             [session['user_id'], profile_user['user_id']],
             one=True) is not None
+    broken_just_for_djangocon
     return render_template('timeline.html', messages=query_db('''
             select message.*, user.* from message, user where
             user.user_id = message.author_id and user.user_id = ?