don't crash on trying to change IP interface for Beremiz_service using taskbar icon if IP wasn't previously
By default IP is not set (None) and service listen only on localhost interface.
These classes are intended for use server-side.
e.g. in a django view.py :
from pyjs.jsonrpc.django import JSONService, jsonremote
jsonservice = JSONRPCService()
@jsonremote(jsonservice)
def test(request, echo_param):
return "echoing the param back: %s" % echo_param