fixed minor issues

network/__init__.py

@@ -27,6 +27,9 @@ import threading
 import time
 import traceback
 
+import blinker
+import curio
+
 lclient = logging.getLogger(__name__+".client")
 lserver = logging.getLogger(__name__+".server")
 lschat = logging.getLogger(__name__+".server.chat")