Added twine check functionality to python-tarball playbook
* twine has introduced a new feature to check the README.rst so that
the content should render fine on pypi
roles:
- check-python-release
- build-python-release
+ - ensure-twine
+ post_tasks:
+ - name: Run twine check on python dist tarball
+ command: "{{ pypi_twine_executable }} check dist/*"
