How to release a new version

• Bump version in appveyor.yml and __init__.py
• Wait for AppVeyor to build the pip packages successfully.
• Download the pip packages from AppVeyor artifacts.
• Publish the new release in GitHub.
• Publish to PyPi with :
  • twine upload pyhelp-0.1.1.tar.gz
  • twine upload pyhelp-0.1.1.dev0-cp36-cp36m-win_amd64.whl
• Bump version back to dev0 in appveyor.yml and __init__.py