0.1.5 broke backwards compatibility with existing cassettes

[joelzimmer]

The upgrade from 0.1.3 to 0.1.5 broke compatibility with existing cassettes, meaning that existing projects using this library (and more importantly nock-vcr-recorder-mocha) will no longer be able to pass tests until they update cassettes.

I would recommend unpublishing the 0.1.5 change and republishing as either 0.2.0 or 1.0.0 so dependent libraries do not pull in the new version.