This is a stripped down rate limit checking implmentation that handles the infrastructure
of deciding how to get rate limit information and leaves it to other implementers to
decided what kind of checks they want to do and how long they want to wait.
The implmentation supports checkers that sleep less than the full time until the
rate limit is expected to reset, allowing for polling and notifying clients of why their query
is not returning.
A basic checker which sleeps until the rate limit is expected to reset is included as working example..
