Merge pull request #12 from steeve/patch-1

Clean the circular reference between Connection and BaseHandler

bjsonrpc/handlers.py

@@ -127,14 +127,15 @@ def _shutdown(self):
             You should add cleanup code here. Remember to call the parent
             function.
         """
-        pass # In the future, here we could have some internal clean-up code.
+        self.close()
 
     def close(self):
         """
             Cleans some variables before the object is freed. close is called
             manually from connection whenever a handler is going to be deleted.
         """
         self._methods = {}
+        self._conn = None
 
     def add_method(self, *args, **kwargs):
         """