Adding keywords to a FITS Header.

    393:    int addBoolKw(Hdr *, char *name, Bool value, char *comment);
    394:    int addIntKw(Hdr *, char *name, int value, char *comment);
    395:    int addFloatKw(Hdr *, char *name, float value, char *comment);
    396:    int addDoubleKw(Hdr *, char *name, double value, char *comment);
    397:    int addStringKw(Hdr *, char *name, char * value, char *comment);
    398:    int addSpacesKw(Hdr *, char *comment);
    399:    int addCommentKw(Hdr *, char *comment);
    400:    int addHistoryKw(Hdr *, char *comment);

The new keywords are added to the keyword list just prior to the ``END'' keyword.