patch::: 1.3.88.jcn1

patch::: 1.3.88.jcn1

1.3.88.jcn1
===========

* Added feature to part combiner that should allow part-switching only
  for entire measures.  Currently, it is controlled by a new
  property changeMoments (A . B):
    - only switch when !(A mod now),
    - decide whether to switch based on music during time period B.

* Made bugfix: Sequential_iterator::get_music (M): mustn't return music
  later than M.

* Added skip (M) to some iterators.

1.3.88
======