Make path to backups and time to keep backups configurable
Configure backup_path and backup_keep_time in default recipe
Create the backup directory
Use string interpolation to set backup_path attribute
Don't use string interpolation. Improve readme for backup path.
Create the backup directory
Merge branch 'configurable_backup_path' of git://github.com/dscheu/cookbook-gitlab into dscheu-configurable_backup_path

Conflicts:
	README.md
	recipes/default.rb