Documentation needs to be moved to https://kitchen.ci/docs/verifiers/inspec/

[tas50]

There is a verifier page at https://kitchen.ci/docs/verifiers/inspec/ which is very outdated but needs to be the page where we document this project. Usage documentation needs to be removed from this repo and moved there with a link. These docs are in the github.com/test-kitchen/test-kitchen/ repo under docs.

See https://github.com/test-kitchen/kitchen-ec2/#configuration for an example of the link.