Corbicula anti virus: GNOME VFS

It took me a while to understand how to work with GNOME VFS and VolumeMonitor, mainly because it took me a while to notice that VolumeMonitor is a singleton. After discovering that fact I've made some serious progress:

There still are some remaining issues:
First, the Pixbuf images are loaded straight from the filesystem using a hardcoded path to the 24x24 images, this probably isn't the way to go and will probably need fixing in the near future.
Second, there are still some entries left (which are scrolled out of sight), which need to removed from the Target TreeView in a proper manner.