Prusa Mini Shims

This is a series of shims designed to adjust for Y axis skew on the prusa mini, they should be installed at the back of the right Y axis extrusion. I have included a markdown file, Calibration Method.md, with the process I used to calibrate my printer back to square.

This is also on [GitHub](https://github.com/pgooch/Prusa-Mini-Shims), feel free to fork and and make a pull request with any tips or improvements you make and I'll update this and any other location it's been uploaded.