Allows you to get the QR code by simply clicking on a button in the Admin area (or by adding .qr to the end of the keyword.)
Move the seans-qrcode folder into the /users/plugins folder. Then, activate the plugin in the admin interface. That's all there is to it.
User must have YOURLS 1.5.1+ installed.
WARNING: Does not work with YOURLS 1.6.
Works with YOURLS Case-Insensitive to generate smaller QR codes!
Main functionality of adding a QR code is borrowed from Ozh's orginal plugin code.
QR code generation made possible by PHP QR Code (Google's own QR Code generation, through the Chart Image API is depreciated and will no longer be developed).