Log Message:
tex-musictex{,-doc}: update to 1.27

 New features:

    \meterN

    \xxtuplet

    pointed half-notes \hap \happ analogous to \qap \qapp

    abbreviations \nqqb \nqqh \nqqqb \nqqqh and synonyms \nqql \nqqu \nqqql \nqqqu

    \hbsk analogous to \hsk

    \bqsk \bhsk \btsk analogous to \qsk \hqsk \tqsk