Create a sample application to demonstrate this post
First chunk of code to try
Got the basics of a QR reader working

Need to tidy up the code a bit, and add the drawing of the corners, but
it's mostly there :)
We now highlight the edge of the detected QR code, not the bounding box

This involves creating a UIView subclass which has a CAShapeLayer
Adds the correct license header to the source files
Adds a line to log out the available metadata objects to recognise
Completes post writeup, including images
Merge branch 'days/16-qr-codes-avfoundation'