Minor typo correction to the README file
Merged https://github.com/zertrin/duplicity-backup.git

Conflicts (straight-forward resolution):
	README.md
Merge pull request #57 from piperj/pull

Minor typo correction to the README file
Fixes issue zertrin/duplicity-backup/issues/41
Fixes issue zertrin/duplicity-backup/issues/41 - conf revert