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QReader - Reading QR Codes
Version 1.1   28 Aug 2014   Add handling of camera privacys settings.
Version 1.0   12 May 2014   Initial version.
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Example of how to use AVFoundation to capture QR codes. See the following post for details:

http://useyourloaf.com/blog/2014/05/13/reading-qr-codes.html

For details on adding an alert view to warn the user when the camera cannot be
accessed and directly launch the settings (requires iOS 8) see the following post:

http://useyourloaf.com/blog/2014/08/28/open-settings-url.html