Init asyncio and ZMQ. Starts a daemon thread in which the asyncio loops run.
    :return: a ZMQ context and a Thread object (as a tuple)

def start_asyncio_and_zmq(debug_asyncio=False):
    """ Init asyncio and ZMQ. Starts a daemon thread in which the asyncio loops run.
    :return: a ZMQ context and a Thread object (as a tuple)
    """
    loop = ZMQEventLoop()
    asyncio.set_event_loop(loop)
    if debug_asyncio:
        loop.set_debug(True)
    zmq_context = Context()

    t = threading.Thread(target=_run_asyncio, args=(loop, zmq_context), daemon=True)
    t.start()

    return zmq_context, t