[#299] v0.6.0, plus python version bumps

[alanking]

In service of #299

We can hold on this til the release notes are done.

[korydraughn]

In the commit body: words captures what -> words capture what ?

[alanking]

Fix'd

[trel]

looks good.

[alanking]

'd. I'll let someone else merge, or, will await the "ready for release" signal.

[trel]

one day we'll update this line too...

        "Development Status :: 4 - Beta",

feel like we're very close.

I think this is done - please to merge when ready.