Squidworks Moduleboard Daughter: Stepper

This is a stepper driver for the squidworks project, that lives with one of the moduleboards for the same. It uses a TMC262 bipolar chopper driver with 4 PN Pair FETs rated for ~ 8A, and features an SPI encoder breakout. Schematic and Board files are available in this repo. A revision is in the works for more intelligent connector placement.