title: why Backbone sending to ajax request on folder in parent directory?
body: <p><em>I am new in Backbone, I am working with php as server-side languge.</em></p>
  
  <p>when the <strong>urlRoot</strong>  is <strong>../server/books</strong> it is sending two request, one described
  <em>301 Moved Permanently</em> and the other request under that is <em>200 OK</em>.</p>
  
  <p>and when I change the <strong>urlRoot</strong> to <strong>/backbone/server/books/index.php</strong> the ajax request that I see in <em>firebug</em> console
  become one item and it is <strong>200 OK</strong>.</p>
  
  <p>Why on the address what I use <strong>../</strong> Backbone send two request?</p>