Add extension library that links with ZXing, adding barcode support through <Barcode> element

How the xml should look:

<Barcode Type="QRCode" Width="3cm" ErrorCorrection="15%">My barcode text</Barcode>

Edit MigraDocXML reader to allow for additional node types to be recognised.

Create a new XML schema that includes Barcode elements

Create Barcode DOM object that extends Image, creates a new temp barcode image when evaluated to some specified folder

Create function that can auto clear up generated barcode images after use.