Priority Queue Polling

This release introduces Priority Queue Polling; A welcomed feature that resolves the issue of simultaneous queries to an accessory with a queued system. For any accessory with a Cmd4_Mode of "Polled" or "FullyPolled", by tagging the polling characteristics with a "queue": < queueName >, all requests of that characteristic will be put into a consecutive queue. The priority of the queue is given to all IOS requests and polling second.
Further documentation of this feature can be found in the Cmd4 Developers Guide and from the Cmd4 Portal at https://ztalbot2000.github.io/homebridge-cmd4