'A shortcut method to create a session, say something, and hang up, all in one step. This is particularly useful for sending out a quick SMS or IM.
Argument: "say_obj" is a Say object
Argument: "to" is a String
Argument: **options is a set of optional keyword arguments.
See https://www.tropo.com/docs/webapi/message.htm'

def message(self, say_obj, to, **options):

    if isinstance(say_obj, basestring):
        say = Say(say_obj).obj
    else:
        say = say_obj
    self._steps.append(Message(say, to, **options).obj)
