[s3] Updating s3util. Will be replaced by ndingst in future
[s3] Updating s3util. Will be replaced by ndingst in future

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