Add example zmq stuff for testing.

SlamController/zmq_pair_testing/pair.py

@@ -0,0 +1,28 @@
+import zmq
+from threading import Thread
+import time
+
+context = zmq.Context.instance()
+
+def client(context):
+    print('in thread')
+    socket = context.socket(zmq.SUB)
+    print('created socket')
+    socket.connect('tcp://localhost:5050')
+    socket.subscribe(b'slam_map')
+    while True:
+        print(socket.recv())
+
+def server(context):
+    print('in thread')
+    socket = context.socket(zmq.PUB)
+    print('created socket')
+    socket.bind('tcp://*:5050')
+    while True:
+        socket.send_multipart([b'slam_map', b'Hi'])
+        time.sleep(1)
+
+# client_thread = Thread(target=client, args=[context])
+server_thread = Thread(target=server, args=[context])
+server_thread.start()
+# client_thread.start()