code: function addRange(item, curSched, name, min, max, offset) {
      // parse range/x
      var incSplit = item.split('/'),
          inc = +incSplit[1],
          range = incSplit[0];
  
      // parse x-y or * or 0
      if (range !== '*' && range !== '0') {
        var rangeSplit = range.split('-');
        min = getValue(rangeSplit[0], offset, max);
  
        // fix for issue #13, range may be single digit
        max = getValue(rangeSplit[1], offset, max) || max;
      }
  
      add(curSched, name, min, max, inc);
    }
docs: Adds a range item (of the form x-y/z) to the schedule.
  
  @param {String} item: The cron expression item to add
  @param {Schedule} curSched: The current schedule to add to
  @param {String} name: The name to use for this constraint
  @param {Int} min: The min value for the constraint
  @param {Int} max: The max value for the constraint
  @param {Int} offset: The offset to apply to the cron value