v1.0.0

Added

• New files subcommand prints files that will be used to determine the packages to install by default #27
• Respects XDG Base Directory Spec when searching for default-packages file(s). #27

Changed

• Commands exit with nonzero status (error) when no default-packages file can be found. #20
• Performance improvement: only invoke npm once (installing all packages at once) instead of invoking npm per package. #28