Add example for streams into README

README.rst

@@ -11,7 +11,7 @@ Documentation
 
 See http://aiozmq.readthedocs.org
 
-Simple client-server RPC example::
+Simple high-level client-server RPC example::
 
     import asyncio
     import aiozmq.rpc
@@ -39,6 +39,35 @@ Simple client-server RPC example::
 
     asyncio.get_event_loop().run_until_complete(go())
 
+Low-level RPC example::
+
+    import asyncio
+    import aiozmq
+    import zmq
+
+    @asyncio.coroutine
+    def go():
+        router = yield from aiozmq.create_zmq_stream(
+            zmq.ROUTER,
+            bind='tcp://127.0.0.1:*')
+
+        addr = list(router.transport.bindings())[0]
+        dealer = yield from aiozmq.create_zmq_stream(
+            zmq.DEALER,
+            connect=addr)
+
+        for i in range(10):
+            msg = (b'data', b'ask', str(i).encode('utf-8'))
+            dealer.write(msg)
+            data = yield from router.read()
+            router.write(data)
+            answer = yield from dealer.read()
+            print(answer)
+        dealer.close()
+        router.close()
+
+    asyncio.get_event_loop().run_until_complete(go())
+
 
 Requirements
 ------------