[fastfat_new]

[fastfat_new]
- Add a helper function for reading (mapping) volume's stream file object.
- Read a boot sector during volume mounting, unpack it and store values in Vcb->Bpb for later usage. In particular, a volume's serial number being empty problem is fixed now. Volume label is still empty.
- Silence more non-important debug prints.

svn path=/trunk/; revision=43477