title: Lucene TextField not tokenized
body: <p>I am saving the following title to index</p>
  
  <pre><code>doc.add(new TextField(TITLE, "Button",Field.Store.YES ));
  </code></pre>
  
  <p>Then when I search for it with say "butto", nothing returns. I must search for "button" to get anything back. What do I have to do so that any substring of button gives a result? I am using </p>
  
  <pre><code> StandardAnalyzer analyzer = new StandardAnalyzer();
  </code></pre>