Fix Docker and add v0.12 release notes (#559)

Install from sdist in Dockerfile.

Update Matplotlib API in notebook example used to showcase Docker at
brainiak.org.

Fix Docker instructions in README.

Include test data in sdist.

Document Windows support; fix Conda instructions (#558)

It seems I forgot to remove quotes from the upload command. I think this
should do it.

The anaconda upload command was just echoing and not actually running.
This fix should hopefully work.

I think I screwed up the conditional for publishing releases. I think
its supposed to be like this. Basing it off of
https://github.com/scientific-python/cookie/blob/c7b897cf4f2f4d8f374d112d1fc694d92a2793a7/%7B%7Bcookiecutter.project_name%7D%7D/.github/workflows/%7B%25%20if%20cookiecutter.__type%3D%3D'compiled'%20%25%7Dcd.yml%7B%25%20endif%20%25%7D#L67

This should allow it to be triggered by clicking creating a new release
through the github page.