dirq_simple.py
    Producer, browser and consumer (dirq.queue.Queue)
    - producer: create a queue, store elements
    - browser : create a queue, get/print elements
    - consumer: create a queue, get/remove elements

dirqset_simple.py
    Browse set of queues (dirq.queue.Queue, dirq.queue.QueueSet)
    - create a number of queue and store elements in them
    - create QueueSet object, add/remove queues, count elements,
      get/print elements