feat: basic implementation of CB2RI

Nothing fancy yet. When we receive a message through ZeroMQ's PUB/SUB
architecture, we tell the robot to say it out loud.

main.py

@@ -0,0 +1,27 @@
+import qi
+import zmq
+import time
+
+
+def say(session, message):
+    tts = session.service("ALTextToSpeech")
+    tts.say(message)
+
+if __name__ == "__main__":
+    app = qi.Application()
+    app.start()
+    session = app.session
+
+    context = zmq.Context()
+    socket = context.socket(zmq.SUB)
+    socket.connect("tcp://localhost:5556")
+    socket.setsockopt_string(zmq.SUBSCRIBE, u"") # u because Python 2 shenanigans
+
+    while True:
+        print("Listening for message")
+        message = socket.recv_string()
+        print("Received message: {}".format(message))
+
+        say(session, message)
+
+        time.sleep(1)