release: 1.3.51

release: 1.3.51

======

* Item cleanups.  Copying items and rearranging pointers are done in
separate passes, which makes the code cleaner. This fixes a problem
with some items not disappearing from hara-kiri staffs.

* Use Scheme for Key_item data members.

* Don't use regex in chord-names.scm under windows; hybrid chordnames
  user+calculated will be partly broken.

1.3