Kimono API usage unsafe

[rblstr]

An error cropped up when Kimono didn't return the correct data schema.

https://github.com/rblstr/flock/blob/30e51892856e5805609c07355f09bda69a22fd0d/flock.py#L59

• Add unit tests for invalid Kimono data.
• Add guards to Kimono parsing code to ensure schema is as expected.