Service loops weren't really feasible/helpful, so don't recommend them via the silkscreen. Fixes#10
Also added testpoints (or could be solder points) for all signals on the top side of the screen PCB. Fixes#11
- Use KiKit for fab automation
- Add splitflap scripts for exporting pcb pdfs, and switch to splitflap script for 3d rendering (for consistency with fab automation)
- Added support in 3d rendering scripts for soldermask & silkscreen colors, option to skip virtual components
- Added silkscreen to base and screen pcbs for commit and date info