title: iphone keychain items persist after application uninstall?
body: <p>I am playing with idandersen's <a href="http://github.com/ldandersen/scifihifi-iphone/tree/master/security/" rel="noreferrer">scifihifi-iphone</a> code for keychain and came across the following behavior - I set the password using, say</p>
  
  <pre><code>[SFHFKeychainUtils storeUsername:@"User" andPassword:@"123"
                    forServiceName:@"TestService" updateExisting:YES error:&amp;error];
  </code></pre>
  
  <p>Then delete test application from device and install it again - the previously set password appears to remain in keychain...<br>
   Is it the expected behavior? And is there a way to make sure that password I set will be deleted with the application?</p>