#4956 Change \retrograde to deal with ties and repeat chords/notes

[David Kastrup]

Change \retrograde to deal with ties and repeat chords/notes

Consists of commits:

Remove warning about ties in \retrograde

Change retrograde-music function to deal with ties

Let \retrograde expand repeat chords/notes

Since those lose their point of reference, expanding them
prior to retrograding keeps the results sane.

http://codereview.appspot.com/302470043

[David Kastrup]

Regtest and fixes for glissandi, \<, > and docs

http://codereview.appspot.com/302470043

[Anonymous]

Passes make, make check and a full make doc.

[Anonymous]

Patch on countdown for the 21st August.

[Anonymous]

Patch counted down - please push.

[David Kastrup]

Pushed to staging as
commit aa516b66c0e603146f94bee9dc74408262792977
Author: David Kastrup dak@gnu.org
Date: Mon Aug 15 19:09:52 2016 +0200

Issue 4956/3: Augment warning about \retrograde

Ties work now, but the documentation points out a lot of other
shortcomings.

commit 6fcbd2a18b171f56ec873520a3c3de2e028a0a04
Author: David Kastrup dak@gnu.org
Date: Mon Aug 15 17:41:04 2016 +0200

Issue 4956/2: Improve retrograde-music function

This allows to work with ties and glissandi, makes somewhat useful
changes for overrides, changes crescendi to descrescendi and vice versa.

commit b757ca820a230ef7393f6ed81e6aceda723caf26
Author: David Kastrup dak@gnu.org
Date: Mon Aug 15 17:40:05 2016 +0200

Issue 4956/1: Let \retrograde expand repeat chords/notes

Since those lose their point of reference, expanding them
prior to retrograding keeps the results sane.

[David Kastrup]

Oh, and obviously also
commit 1e678c08e37073ffac482618655dc87308e5c0b4
Author: David Kastrup dak@gnu.org
Date: Tue Aug 16 16:23:57 2016 +0200

Issue 4956/4: Add regtest for \retrograde

Sorry for forgetting this one.