manually include vc runtime in windows package
ensure USAGE.txt is included in sdist and wheel
fix script entry guard - ignore errors if stdio does not exist
fix mac packaging script for latest cx_freeze
Merge packaging fixes
update linux package names to python3-*
update metadata
bump version to 2.0.3
packaging: ensure dlls are not included in mac and linux packages
ensure that release.json gets installed and pythonw gui script gets i… …ncluded in wheels