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Looks good, thanks for the testing work!

* Bump version post-release

* Create CHANGELOG.md

* Create python-publish.yml (#46)

* Create MANIFEST.in

* Update README.md

* Update setup.py

Proxy JupyterHub 0.9 progress method to child

Fixes #39

- I talked with @minrk about the problem with config being saved, and
  apparently the right answer is that wrapspawner was not clearing the
  state properly.
- `.clear_state()` is a hook that is called anytime a spawner is
  stopped.  This needs to clear everything - and it was missing
  child_conf.
- Closes: #31
- Thanks to @minrk

- Closes: #20

DockerSpawner parameter for container image has been renamed and the docker image names have also changed since the latest edition of the readme.

Jupyterhub 0.8 compatibility.

Based on the [comment](https://github.com/jupyterhub/wrapspawner/issues/10#issuecomment-351268520) by @sknigh

Closes #10
Closes #11

Added a screenshot to the documentation.

* Add DockerProfilesSpawner.

Why:

* It makes it simpler to give options for which image to use.
* We needed nvidia support.

This change addresses the need by:

* Create a DockerProfilesSpawner that uses the ProfilesSpawner.

Side effects:

* GPU support requires nvidia-docker otherwise no GPUs will be linked.

* Address comments on PR.

This change addresses the need by:

* Don't require docker when importing it.
* Throw a useful exception when docker isn't available.
* Add a docstring to the DockerProfilesSpawner class.

Side effects:

* If the docker package is not available then things won't error until a
  user tries to load the spawner page rather than at startup.

Adding license - issue #12