aptly: release $version

aptly: release 1.6.0

S3: support disabling ACL with `none` valueThis change lets you disable ACL when using S3 by using a configurationvalue of `none`. This way we maintain backward compatibility with thedefault setting being `private`.Fixes:#1067

Merge pull request#847 from smira/fix-repo-nameFix repo name in release script

Buffer increase (#738)Increase Scanner buffer size for Stanza reader

Merge pull request#683 from smira/545-download-contxtUse Go context to abort gracefully mirror updates

Merge pull request#614 from smira/600-fix-double-mirror-updateFix bug with `PoolPath` field being overwritten on mirror update

Merge pull request#613 from smira/607-trim-slashesTrim slashes while parsing publish prefix

Fix temporary contents DB being left behind after publishingNB: Go `defer` order execution is reverse to the order `defer` statementsare executed.So before the change, `Drop()` was called before `Close()`, which was no-op.Change that to explicit order in single func, print errors if they happen.

Merge pull request#531 from smira/release-1.0.0-preparationPrepare for new release, update build instructions [ci skip]