title: How can i remove slug in custome post type url?
body: <p>In listings theme by Woothemes, the child them Bookclub.
  when I add a book - as a custom post type - the url become as following :</p>
  
  <pre><code>mysite/book/post-name
  </code></pre>
  
  <p>I tried to remove the slug "book" but i failed
  I want it to be </p>
  
  <pre><code>mysite/post-name
  </code></pre>