Reddit's API access rules require that no more than 1 request is made every 2 seconds
(i.e 30 requests per minute). This client makes it easy to track the time, and ensures that
the 2 seconds pass between each request. Its a singleton class, use PoliteRestClient.get()
to get an instance. This is so all classes / requests are limited by the same limitation
Waiting time in milliseconds.
Last time a request was made.