Order Printer Pro: PDF Invoice

Just started out with our online shop and all of Bjorn's apps have meant we've made the process more efficient and consistent stylistically.
We now include links to the invoice within email notifications (we save on printing, nicer on the environment) and Bjorn was quick to respond to a small tweak.
The ability to start on the free plan until you reach 50 orders is nicer than a blanket charge for using the app.