* python/dbus.py:
* python/examples/example-client.py:
* python/examples/example-service.py:
* python/examples/list-system-services.py:
Add SessionBus, SystemBus and ActivationBus classes
so you don't need to know the special little BUS_TYPE
flag.
* python/dbus.py: Add the actual message when calling the reciever
of a signal such that parameters can be inspected. Add the method
remove_signal_receiver