convert the plugins into true KDE plugins with desktop file and all.
let the user pick a backend in the config dialog and load backends on the fly.
svn path=/trunk/extragear/sysadmin/partitionmanager/; revision=1105758
fix the gazillion arg-unused warnings in the dummy plugin with plenty of
Q_UNUSED usage until the dummy plugin gets a little meatier.
svn path=/trunk/extragear/sysadmin/partitionmanager/; revision=1097717