code: function write_XLUnicodeString(str, opts, o) {
  	if(!o) o = new_buf(3 + 2 * str.length);
  	o.write_shift(2, str.length);
  	o.write_shift(1, 1);
  	o.write_shift(31, str, 'utf16le');
  	return o;
  }
docs: /* TODO: BIFF5 and lower, codepage awareness