[cctbxbb] pull request - fable

Hi All, Sorry for the intrusion, the Github page suggests contacting the devs on the mailing list before making a pull request. I ran into some minor issues building fable and was wondering if it's worth submitting a pull request. - invalid pre-processor directive (fixed upstream at boost https://github.com/boostorg/thread/issues/364) - Invalid python API call ( fixed upstream at boost here https://github.com/boostorg/python/pull/344) - Need to install python.h : This one seems tricky as it varies between platforms and it's probably not a 'you problem'. Maybe add a line to the setup documentation. Interestingly it needs to be installed on the host machine, not in the conda venv. Kind regards Nic Gould