start of creating an events cassette
Trim down the response to 2 events
Create some unit tests for Clever::Util#convert_to_clever_object
Fall back to CleverObject if the URI we're trying to convert doesn't have the format we're expecting instead of crashing

Basically add a guard for a nil match before looking for the first part of the match.
Extract a method that just handles the conversion of a URI to a Clever class
Create the concept of a Clever::Event and be able to retrieve a District's events
Correct the class names of some tests
Depluralize the filename of the School test to be consistent
Extract a method that just converts a string token to a Clever object type

This code can then be shared with Event to process the event type.
Add Event#action and Event#object for ease of working with Clever::Event