code: function(fileLine, params) {
                var lines = fileLine.lines;
                var csvLines = csvline(lines,params);
                return {
                  lines: csvLines.lines,
                  partial: csvLines.partial + fileLine.partial
                };
              }
docs: Convert data chunk to csv lines with cols
  @param  {[type]} data   [description]
  @param  {[type]} params [description]
  @return {[type]}    {lines:[[col1,col2,col3]],partial:String}