nlobjColumn.addParamToURL ( param , value , perRow )

/**
* add a URL parameter (optionally defined per row) to this column's URL.
*
* @param {string} param the name of a parameter to add to URL
* @param {string} value the value of the parameter to add to URL -or- a column in the datasource that returns the parameter value for each row
* @param {boolean} [perRow] if true then the 2nd arg is expected to be a column in the datasource
*
* @method
* @memberOf nlobjColumn
*
* @since 2008.2
*/