add echo route

app.py

@@ -69,3 +69,9 @@ def route_ticker(sock):
         sock.send(tick);
         tick = tick + 1
         time.sleep(0.5)
+
+@sock.route('/echo')
+def route_echo(sock):
+    while True:
+        data = sock.receive()
+        sock.send(data)