fixup! Merge 'switch to msgpack'

neo/lib/connection.py

@@ -323,7 +323,7 @@ class Connection(BaseConnection):
 
     def __init__(self, event_manager, *args, **kw):
         BaseConnection.__init__(self, event_manager, *args, **kw)
-        self.read_buf = ReadBuffer()
+        self.read_buf = Unpacker()
         # NOTE cur_id will be set in Server|Client to maintain `cur_id % 2 == const` invariant
         #self.cur_id = 0
         self.aborted = False