title: Is it possible to rename `createdAt` and `updatedAt` in sails.js / waterline
body: <p>Using Waterline ORM from SailsJS, my defaults for <code>autoCreatedAt</code> and <code>autoUpdatedAt</code> are set to false, but I still need to implement to the functionality just using different field names (DBA request). Is there a way to either:</p>
  
  <ol>
  <li>specify different column names for the automatically generated field, or</li>
  <li>manually emulate the same behave in an attribute definition, or</li>
  <li>can I just leave custom fields in the schema like <code>created_ts</code> and <code>updated_ts</code> to be updated with triggers in the DB schema itself (but I still need Waterline to read them)?</li>
  </ol>
  
  <p>Thanks in advance.</p>