NTFS metafile (MFT) size handling, 2 fixes

Closer to 100% space accounting

NOTE: altWinDirStat will only try to query the MFT size if you open the root directory (e.g. C:\). altWinDirStat will only succeed in querying the MFT file size (and other NTFS metafiles) if run as an administrator.

In pursuit of 100% used-space-accounting-for (as NTFS "misreports" free space), altWinDirStat now displays the size of the NTFS Master File Table, and I've implemented experimental support for displaying the sizes of other NTFS metafiles.

I've also fixed the annoying issue (#9) where running altWinDirStat for the first time - only where the vanilla version of WinDirStat has also not been run - would display a garbled file tree & file type list. For more information, see Pull Request #10.

I also fixed issue #8, by eliminating the "special" case in CompareS.

This release does suffer one regression: working with very large folders (number of items) is a bit slower, sadly. I fixed an annoying bug where the last item in the list view would appear after the parent folder had been collapsed. I refer to it as a "zombie item". For more information, once again, see Pull Request #10.

As usual, they're statically linked. I recommend using the 64 bit builds wherever possible.