Add /stats, /stats/queues, & /stats/queues/:name json endpoints to web

Fixes issue #2098 
yeah, I didn't think about it needing to ask redis for information about each queue.  is there a method we can add to the redis connector that just returns the count of queues instead of a handle to each of the queues?

If not, then agree shouldn't probably add this hear for performance reasons and have people go to /stats/queues for queue data