bin/backup.sh: Output latest backup.
bin/enc-backup.sh: Add.

Works like backup.sh but encrypts with encfs (ie. using --reverse)
before transmitting. (This slightly complicates the procedure since it
among other things needs to create a list of encrypted exclude filenames
before rsyncing.)
bin/backup.sh: Synchronize with enc-backup.sh.
backup.exclude: Make sure it works with enc-backup.sh