Adding support for all S3 canned ACLs (#663)

Adding all canned ACL names as documented in
http://docs.aws.amazon.com/AmazonS3/latest/dev/ACLOverview.html#CannedAC
L.
Merge branch 'asieira-develop' into develop

* asieira-develop:
  Adding support for all S3 canned ACLs (#663)
Update changelog entry for #663