Actually compile the codec config and declare the config as extern
or else it's just all 0.
Only acquire the transport when ACTIVE.
Implement transport state_change signal and acquire the transport
when going to pending/active.
Try to acquire the transport before we expose the device if we
can.
Force device expose when we get the device ServicesResolved=1 property
update.
Free transport when the rfcomm is closed.
Implement various DBus signals to detect dynamic property updates.
Make the monitor and device emit the info and items when the callbacks
are set. This makes it easier to implement the monitor because there
is much less state to keep around and invalidate etc.
Rework the monitors
Add bluez5 device
