Virtual hal devices with ltspfs

The current ltspfs implementation bind mounts ltspfs mounted filesystems in /media/$USER and relies on gnomevfs to do the rest of the work like displaying an icon on the desktop and adding the device entry to the places list. On systems that dont use gnomevfs the user needs to navigate to this dir manually if they dont monitor /media in a differnt way. To improve this functionallity by attacking a lower layer, virtual hal blockdevices should be created and the ltspfs mounting and any further handling of these devices should be left to hal and gnome-mount (or the kde equivalent).