title: Page refresh (F5) always causing form to submit
body: <p>a bit new to CI, googled and overflowed alot and still got no answer</p>
  
  <ol>
  <li>User enters site.</li>
  <li>After succesful auth got redirected to main page</li>
  <li>Link on the url stays the same with class/method</li>
  <li>If u refresh page on a main - u always got question about repopulate form (chrome/firefox 100%)</li>
  </ol>
  
  <p>the solution may be: <strong>after success redirect to another class or method</strong></p>
  
  <p>but i don't know how to do it, documentation seems more like reference to me</p>
  
  <p>code is here: <a href="http://paste.ubuntu.com/696751/" rel="nofollow">http://paste.ubuntu.com/696751/</a> line 28 - how to do redirect to another class or method with a redirection to another view too?</p>