In addition to installing and configuring the new module, this also
enables public access to the S3 API via `bucket-name.s3.kosmos.org` as
well as Web access on `bucket-name.web.s3.kosmos.org` (when enabled).
Also includes some drive-by improvements to Chef attribute naming and
usage.
Co-authored-by: Greg Karékinian <greg@karekinian.com>
