* Updates entire library to be compliant with the new `v2` API (endpoints, HTTP methods, etc)
* Build requests via a `Client` now providing your email and api_key
* Added optional `base_url` and `timeout` options to client
* Module names are now plural
* The Client now checks if an email and api_key is provided and raises an error if not
* Removed `utils` module (pretty print)
* Added unit tests (closes 1)