Added remote backup capability when creating backups with FTP and
theoretically S3.
Updates for the duplicate file finder.
Added restore capability from remote. Needs the backup.properties
though.
Refactored CountingFileManager. Restore can even restore without a
backup.properties.
Forgot a file.
Added delta files for incremental backups. Filemanager supports dates in
filenames.
Updated AES encryption. Bugfixes. Reporting of upload progress.