[PATCH] Including files in source distributions with MANIFEST.in

When packaging as .deb/.rpm with setuptools (sometime without
setuptools_scm), some required template files are excluded from the
final packaging result, unless specify them within `MANIFEST.in`.

See https://setuptools.pypa.io/en/latest/userguide/miscellaneous.html
See https://packaging.python.org/en/latest/guides/using-manifest-in

Signed-off-by: Wong Hoi Sing Edison <hswong3i@pantarei-design.com>

MANIFEST.in

@@ -0,0 +1,9 @@
+include LICENSE
+include README.md
+
+recursive-exclude * __pycache__
+recursive-exclude * *.py[co]
+
+recursive-include src/molecule_plugins/*/cookiecutter **/*
+recursive-include src/molecule_plugins/*/modules **/*
+recursive-include src/molecule_plugins/*/playbooks **/*