Note compliance with "file/Record transform invertible if poss." requrement
Note compliance with "SITE cmd for non-standard features" requirement
Add test for binary put/get invertability
Remove from non-compliance list those items dealing with REST.

Since Ftpd does not support REST, and REST is not required for
complaince, these items are not applicable.
Document how to create a custom disk file system
ReadOnlyDiskFileSystem