add a uibarbutton for ZBarReaderViewController
<p>I am working on ZBarReader and What I am having so far right now is </p>

<pre><code>ZBarReaderViewController *controller = [[ZBarReaderViewController alloc] init];
controller.navigationController.navigationBarHidden = NO;
// Add Edit button to the right and handle click event UIBarButtonItem *manualButton = [[UIBarButtonItem alloc] initWithTitle:@"Manual" style:UIBarButtonItemStyleBordered target:self action:@selector(EditMode:)];
[controller.navigationItem setRightBarButtonItem:manualButton];
controller.readerDelegate = self;
[self presentModalViewController:controller animated:YES];
</code></pre>

<p>My question is that can we so such things above : set toolbar visible and add button on it for ZBarReaderViewController.</p>
