add rdiff-backup as system dependency
Merge branch 'master' into backup
add backup server minion
configure backup server to create and mount backup volumes
install rsync for rdiff-backup
create necessary directories, users, and permissions for configured backup clients
add backup server configuration for development
configure backup clients to run backups as specified in pillar
README for backup.client
add backup examples for development
enable development backups
Enable Archive logging for postgres cluster
Merge pull request #12 from python/backup

Implement Backups for PyPI data files and postgresql master