* added detailed progressfeedback. It still needs some polishing, but is already far better then the old situation. And what's more, it's finally threadsafe :p
* rewrote quite some stuff to use an enum to indentify filesystems instead of stringcomparisons.
* lots of stuff and cleanups, including fixing getting used/unused space of hfs/hfs+/fat16/fat32 * also fixes bug #161362