An attempt at mocking time using Moka

Currently appears to prevent the test from even being run (test count 9 with 10 test functions).
Need to register the setup and teardown functions
Moka needs to be started in the test suite
Implement time-expiration with fixed period of 1 day
Implement custom TTL

Currently can't specify a custom TTL and not an ID. Not sure how to do this, since the arity would be the same as an ID assertion without a custom TTL.
Include example usage
Merge branch 'feature/expiration' into develop