Update documentation to cover Cats useage

[keirlawson]

It looks like the latest version of this project now supports Cats. It would be great to have some documentation/examples of how to use this with Cats.

[tobyweston]

Is https://verizon.github.io/knobs/ the correct docs? The API seems to have moved on a fair bit from what's there no?

[rossabaker]

The CI that used to publish was taken down at Verizon. You should be able to get the latest version of the docs locally by running makeSite on a local checkout.

We're still looking for a replacement CI for automated releases and site publication.