Add ZeroMQ topics implementation

[elchicodepython]

• Support ZeroMQ topics.
• Support ZeroMQ authentication.

Demo sending JSON to ZeroMQ topic:

import sys
import time

port = "5556"
if len(sys.argv) > 1:
    port =  sys.argv[1]
    int(port)

context = zmq.Context()
socket = context.socket(zmq.PUB)
socket.bind("tcp://*:%s" % port)

import json

while True:
    topic = "pac"
    messagedata = json.dumps({"hello": "world"})
    print ("%s %s" % (topic, messagedata))
    socket.send_string("%s %s" % (topic, messagedata))
    time.sleep(1)