docs: function parseCSVOpts(optString, formatter) {
    var splittedOpts = (optString || '').split(',');
    var csvOpts = {};
    var opts;
    for (var i = 0; i < splittedOpts.length; i++) {
      opts = splittedOpts[i].split('=');
      if (opts.length === 2) {
        if (typeof formatter !== 'undefined') {
  	csvOpts[opts[0]] = formatter(opts[1]);
        } else {
  	csvOpts[opts[0]] = opts[1];
        }
      }
    }
    return csvOpts;
  }