backup 5.x-3.0

The following things have been fixed/changed in this release:

- http://drupal.org/node/135434

- http://drupal.org/node/139355 - Implemented borfast's patch

- Some misc wording changes to make things a little clearer

- Implemented a new mechanism for excluding files in a backup directory, courtesy of a suggestion from guenneguez_t

- Backups can now be made from the parent directory! See http://drupal.org/node/146863 for details.

For tracking purposes, any additional information will be posted at http://drupal.org/node/151077