added the exceptions module for Python 3

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