Move into own include directory for clarity. Also allows qa_utils
to use its own private headers in qa/qa_utils without exposing them
through the target_include_directories directive.
Add a tool that allows a user to run DRC functions
on a given KiCad PCB file.
The first available functions are the courtyard functions.
Also move most of the utility program logic into qa_util for
better reusability.
John Beard