Some initial work on figuring out how to do a kcm based configuration screen for the services that needs a such.

For testing I am using the ampache service. I have got it so far that it recognizes that there is a config screen, adds a setings button in the plugin selector and loads the module when said button is pressed.

However, I get a nasty QDbus related crash that I cannot figure out. In other words DO NOT press that button (unless you want to help figuring out why it crashes which would be greatly appreciated as I am stuck...)