[Tracker] runtime checking for tracker availability

["Mikkel Kamstrup Erlandsen" <mikkel kamstrup gmail com>]

Is there an easy *clean* way to check if tracker is installed at runtime? I thinking here namely on the deskbar handler which needs to do this.

I have been playing around with some dbus stuff. I need a call to check whether tracker is available without starting it (via dbus activation)!

dbus.bus.ListActivatableNames was added in dbus 0.91.0 but edgy only has 0.70.0...

Cheers,
Mikkel