Added listen backlog size to docs

README.md

@@ -38,7 +38,7 @@ Basic usage
         sock = twspy.websocket()
         sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
         sock.bind(('', 8000))
-        sock.listen()
+        sock.listen(5)
 
         client = sock.accept()
         client.send(twspy.Frame(twspy.OPCODE_TEXT, 'Hello, Client!'))
@@ -75,7 +75,7 @@ Basic usage
 
         server = twspy.websocket()
         server.bind(('', 8000))
-        server.listen()
+        server.listen(5)
 
         while True:
             client, addr = server.accept()

websocket.py

@@ -18,7 +18,7 @@ class websocket(object):
     >>> sock = twspy.websocket()
     >>> sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
     >>> sock.bind(('', 8000))
-    >>> sock.listen()
+    >>> sock.listen(5)
 
     >>> client = sock.accept()
     >>> client.send(twspy.Frame(twspy.OPCODE_TEXT, 'Hello, Client!'))