Replication of inexpensive setup

The release v1.1 contains a step-by-step building guide for the inexpensive treadmill. A summer student replicated the setup just based on the paper and other publicly available resources and documented the process.

Supplement for Paper

This is a collection of components that are used in the paper "An Inexpensive, High-Precision, Modular Spherical Treadmill Setup Optimized for Drosophila Experiments" by Frank Loesche and Michael B. Reiser (https://doi.org/10.3389/fnbeh.2021.689573).