title: Reachability - strange issue
body: <p><code>Reachability *r = [Reachability reachabilityWithHostName:@"www.google.com"];</code>  </p>
  
  <p>This line works fine on device, but on simulator i get crash :  </p>
  
  <blockquote>
    <p><em>*</em> Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '+[Reachability reachabilityWithHostName:]: unrecognized selector sent to class</p>
  </blockquote>
  
  <p>Does anyone know why ?</p>