[Fixed] QR Code Generator

thingiverse

### REMIXED BY [newdesigner](https://www.thingiverse.com/newdesigner). YOU CAN VIEW HIS QR CODE GENERATOR [HERE](https://www.thingiverse.com/thing:258542).\r\n\r\nThis remix resolves an issue where a model fails to compile when this QR-code generator is used as a library in another OpenSCAD file:\r\n\r\n`use <QR_generator.scad>;`\r\n\r\nIt likely resolves the issue that causes the Thingiverse Customizer to crash as well, but I won't know until the Customizer is back up.\r\n\r\nI might explore expanding the functionality of this OpenSCAD program (if the original author doesn't), because I prefer not having to deal with complicated scripts to use QR-codes in my designs.