switched to gevent zmq, fixed hangups

zipline/core.py

@@ -2,7 +2,7 @@
 Provides simulated data feed services...
 """
 import multiprocessing
-import zmq
+from gevent_zeromq import zmq
 import json
 import copy
 import threading

zipline/messaging.py

@@ -3,7 +3,7 @@ Commonly used messaging components.
 """
 import json
 import uuid
-import zmq
+from gevent_zeromq import zmq
 
 import zipline.util as qutil
 

zipline/sources.py

@@ -2,7 +2,7 @@
 Provides data handlers that can push messages to a zipline.core.DataFeed
 """
 import datetime
-import zmq
+from gevent_zeromq import zmq
 import json
 import random
 

zipline/test/client.py

@@ -1,4 +1,4 @@
-import zmq
+from gevent_zeromq import zmq
 import json
 import zipline.util as qutil