I've added a new API for fetching a task's result given on the task's ID. You
can now call huey.result(task_id) and retrieve the result if the task has
finished executing. Additionally, the Huey.result
method accepts the same parameters as AsyncData.get,
allowing you to block for results, specify a timeout, etc.
There is also a new parameter on the above methods, preserve=False. By
default, the result store will delete a task result once it has been read. Specifying
preserve=True ensures the data is not removed.