Create API Testbed about circleci-docs

[felicianotech]

@ndintenfass As in live testing? Using real data? Demo API token?

[drazisil]

I'm thinking live testing would be best. The result structure for example data should already be covered in docs, but being able to quickly check a token for data would be faster then curl, especially on Windows where it doesn't usually come installed (that I recall)

[smart-alek]

For clarity, @ndintenfass is this a browsable API a la https://stripe.com/docs/api? Or more something like this? http://restframework.herokuapp.com/

Either way, I think this is probably blocked by a spec.

[smart-alek]

@ndintenfass gave me permission to close this one down. Too big to be merely an "issue".