Version 1.6 update -

* Removed large hole on bottom solder mask (because vias will short out with plane if a metal heatsink is used, this is kinda pointless)
* Changed R13 to 8.3K to give much more useful range of pot motion
* Added current limiting resistors to STEP and DIR lines
* got rid of all angle errors in DRC
* Added more explanation of R16 current adjust pot behavior in schematic