Adding/Inserting already formatted keywords

    426:    int addFitsCard(Hdr *, char *card);
    427:    FitsKw insertFitsCard(FitsKw, char *card);

These functions take an already formatted FITS "card" and either adds the string to the list or inserts it after the current position. If the string is less than 80 bytes it is padded with spaces to 80 bytes. If the string is more than 80 bytes it is truncated.