I needed to be able to change the size (complexity) and the overall size of the generated qr code as well as make sure the png was written to the filesystem as to not regenerate the same data over and over again. Let me know what you think... I'll help bring it up to speed if need be. Thanks. :)
Allow custom sized rqrcodes.
Added a rudimentary cache option.
Added ability to change QRCode line width from within the renderer
This looks pretty good. I'll play around with it this week.