Release procedure

This is more a note to self section on how to create a new release.

1. Determine the version numbers of this release and the next.

2. Switch to the release branch and merge the default branch into the release branch.

   $ hg update release
   $ hg merge default
   $ hg commit
   

3. Check the version number in ppci/__init__.py

4. Make sure all tests pass and fix them if not.

   $ tox
   

5. Tag this release with the intended version number and update to this tag.

   $ hg tag x.y.z
   $ hg update x.y.z
   

6. Package and upload the python package. The following command creates a tar gz archive as well as a wheel package.

   $ python setup.py sdist bdist_wheel upload
   

7. Switch back to the default branch and merge the release branch into the default branch.

   $ hg update default
   $ hg merge release
   $ hg commit
   

8. Increase the version number in ppci/__init__.py.

9. Update docs/changelog.rst