title: App crashing when trying to create a TBXML object with this xml
body: <p>I am trying to parse following xml using tbxml library - </p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;REPLY   replyCode="Success" &gt;
  &lt;TRACK track_id="1302234"  track_mp3="74-Ruff_Ryders_feat_Sheek_Louch_and_Big_Pun_-_PiÃ±a_Colada.mp3"&gt;&lt;/TRACK&gt;
  &lt;/REPLY&gt;
  </code></pre>
  
  <p>But when I tried to create TBXML object the app is crashing I think this is because of some special chars in xml file (PiÃ±a).</p>
  
  <p>Any idea on this?</p>