[sugar] A Launcher Activity

[Marco Pesenti Gritti]

 > What I don't see is a good reason for us not to be able to do this.

In the current system you just need to call the create() method of
your activity DBus service, I don't see a lot of point in reusing
activityfactory if you don't want startup notification.

Once the rainbow changes lands you would have to call a similar method
on the rainbow service. Though there you will run into security
restrictions.

Marco