Remove the node state. The state of the node is based on the state
of the ports, which can be derived directly from calling the port
methods. Track this state in the Port instead.
Add a mixer module that puts a mixer in from of audio sinks. This allows
multiple clients to play on one sink (still has some bugs). do some
fixes in the mixer and the scheduler to make this work.
Move send and dispatch functions to the implementation. This makes it
possible to place an access check before sending and dispatching.
Add module-access that allows to bind and notify on globals owned by
the client.
Remove the Daemon object and remove all dbus code from the main
objects. We can use the signals in a separate module to create and
destroy the DBus interfaces.
Move the dbus protocol in a module
Move the autolink policy to a module
