updated picoTCP to 1.4.0, lowered build optimization levels to -O2, improved selftest

ext/picotcp/test/python/zmq_linux.py

@@ -0,0 +1,34 @@
+#!/usr/bin/python
+from  topology import *
+import zmq
+import sys
+
+T = Topology()
+net1 = Network(T, "pyt0")
+
+#h1 = Host(T, net1)
+h2 = Host(T, net1, args="zeromq_prod:")
+
+sleep(1)
+raw_input("Press enter to continue ...")
+start(T)
+
+# Zeromq part
+ctx = zmq.Context()
+z = ctx.socket(zmq.SUB)
+z.setsockopt(zmq.SUBSCRIBE, "")
+z.connect("tcp://172.16.1.2:1207")
+print "In the loop..."
+for i in range(20):
+  if z.poll(20000) == 0:
+    print "Timeout!!!"
+    cleanup()
+    sys.exit(1)
+  else:
+    msg = z.recv()
+    print "Recvd msg len=%d content: %s" % (len(msg), msg)
+  
+
+
+
+cleanup()