Version 7.4 Released

Written for Déjà Dup by Michael Terry on 2009-02-12

* Don't ask for S3 bucket name (and default to deja-dup). Buckets are
  S3-global and that default is certainly taken. Instead, generate bucket name
  from user ID. Ask user for an optional folder in the bucket instead.
* Fix bug that prevented cleanup on FAT32.
* If no passphrase is provided, turn off encryption.
* Add better errors for a couple cases (bad encryption password, not signed up
  for S3).
* New Dutch translation
* Updated French, Hebrew, and Spanish translations