#191 Not consistent OrphanFiles and attributes

[Brian Carrier]

In FAT, $OrphanFiles has a single attribute with size 0. In NTFS, it has no attributes and therefore processAttributes() in TskAuto does nothing with it (meaning it doesn't get added to the DB in AutoDB). This should be consistent. Not sure if the answer is to always have an empty attribute or make sure that we properly document that there could be no attribute (and modify processAttributes() accordingly).