Creating a new release

Follow PEP 440.

1. Create a new branch maint/x.y.z.
2. Update the examples in README.md (use the new version)
3. Build wheel (python setup.py bdist_wheel)
4. Test installation of wheel in fresh python3 docker container
   • Fix any issues and redo previous step
5. Merge the branch into master.
6. Tag master branch neurodocker version x.y.z
   • Use git tag -a -m 'neurodocker version x.y.z' x.y.z
7. Rebuild the wheel with python setup.py bdist_wheel
8. Upload wheel to PyPi with twine upload dist/*
9. Build new Docker container and upload to DockerHub
10. Remove the maint/x.y.z branch. We won't maintain old version, just release new ones.

Adapted from scikit-learn's wiki.