patch::: 1.3.152.jcn1

patch::: 1.3.152.jcn1

1.3.151.jcn4
============

* Added alternative introduction to tutorial; to be merged.

* Reverted simple easy note head function, as some printers seem to
choke on it (so there are printers that don't use ghostscript?).

* Chord tremolo fixes: shift beams vertically on whole notes.  Center beams on whole notes.  'beam-gap' had been renamed to 'gap', but only for reading.

1.3.151.uu1
===========