[s3] Updating s3util to reflect new bucket and key schema
[s3] Updating s3util to reflect new bucket and key schema

neurodata/ndlib,neurodata/ndlib,openconnectome/ocplib,openconnectome/ocplib,openconnectome/ndlib,openconnectome/ndlib,openconnectome/ndlib,openconnectome/ocplib,neurodata/ndlib