Bring back a simplified version of buildUsageError() utility originally stubbed out in 01c73b58c432ef9b5fa74b2c84365525e2afea79.
Bring back a simplified version of buildUsageError() utility originally stubbed out in 01c73b58c432ef9b5fa74b2c84365525e2afea79.

balderdashy/waterline,luislobo/waterline