make pymeta_helper indifferent to $CWD
make robust to working directory
clean up formatting
lint
linting
lint
add lint, test targets for python files to build.ninja
rework build.ninja a bit
move hello into separate dir
add better rules for pylint, pytest
add dependencies on generated pyn_parser.py
fix typo in build.ninja
fix handling of folded lines, but punt on comments for now