added the exceptions module for Python 3

For me it removed this error:

    Traceback (most recent call last):
      File "C:/Users/wollknaeul/Documents/HPI/_Semester 8/Komponentenprogrammierung und Middleware/ping/python/shutdown.py", line 5, in <module>
        playfield.shutdown()
      File "C:/Users/wollknaeul/Documents/HPI/_Semester 8/Komponentenprogrammierung und Middleware/ping/python\Pyro4\core.py", line 163, in __call__
        return self.__send(self.__name, args, kwargs)
      File "C:/Users/wollknaeul/Documents/HPI/_Semester 8/Komponentenprogrammierung und Middleware/ping/python\Pyro4\core.py", line 323, in _pyroInvoke
        data = serializer.deserializeData(msg.data, compressed=msg.flags & Pyro4.message.FLAGS_COMPRESSED)
      File "C:/Users/wollknaeul/Documents/HPI/_Semester 8/Komponentenprogrammierung und Middleware/ping/python\Pyro4\util.py", line 155, in deserializeData
        return self.loads(data)
      File "C:/Users/wollknaeul/Documents/HPI/_Semester 8/Komponentenprogrammierung und Middleware/ping/python\Pyro4\util.py", line 440, in loads
        return self.recreate_classes(serpent.loads(data))
      File "C:/Users/wollknaeul/Documents/HPI/_Semester 8/Komponentenprogrammierung und Middleware/ping/python\Pyro4\util.py", line 351, in recreate_classes
        return self.dict_to_class(literal)
      File "C:/Users/wollknaeul/Documents/HPI/_Semester 8/Komponentenprogrammierung und Middleware/ping/python\Pyro4\util.py", line 321, in dict_to_class
        exceptiontype = getattr(exceptions, classname.split('.', 1)[1])
    NameError: name 'exceptions' is not defined