#5327 Allow Scheme/identifiers for duration multipliers

[David Kastrup]

Allow Scheme/identifiers for duration multipliers

Also contains commit:

Regtest for computed duration multipliers

http://codereview.appspot.com/346810043

[David Kastrup]

No good dead goes unpunished. Documentation and harmonization.

http://codereview.appspot.com/346810043

[Anonymous]

Passes make, make check and a full make doc.

[Anonymous]

Patch on countdown for May 29th.

[Anonymous]

Patch counted down - please push.

[David Kastrup]

Pushed to staging as
commit ddde3ab8c6fed953f47d5a81a8c95f125bab5e22
Author: David Kastrup dak@gnu.org
Date: Wed May 23 22:13:11 2018 +0200

Issue 5327/6: Documentation for computed duration multipliers

commit 1092286e3744ad231766c69ea2bcc7055a81ff43
Author: David Kastrup dak@gnu.org
Date: Tue May 22 22:46:12 2018 +0200

Issue 5327/5: Regtest for computed duration multipliers

commit 027538606b016afb643555d654cefaee94dfb424
Author: David Kastrup dak@gnu.org
Date: Wed May 23 19:08:31 2018 +0200

Issue 5327/4: Let \afterGrace and \scaleDurations take a scale

That's more versatile than allowing just a fraction as a pair
as previously.

commit 389fe5b54f091ea599e39a70b7c002af4d1da893
Author: David Kastrup dak@gnu.org
Date: Wed May 23 19:06:32 2018 +0200

Issue 5327/3: Let ly:music-compress take a scale? argument

This makes it less awkward and more generic to use.  Also let the underlying
functions Music::compress and compress_music_list take a Rational instead
of a Moment.  That's quite more natural to use here.

commit fb0dc422c8224696b027afc7df6088d836cdc06c
Author: David Kastrup dak@gnu.org
Date: Tue May 22 22:45:18 2018 +0200

Issue 5327/2: Allow Scheme/identifiers for duration multipliers

commit 5bf9fa99a05c11178cb14b163d1c1ab0c2c72dee
Author: David Kastrup dak@gnu.org
Date: Wed May 23 17:26:23 2018 +0200

Issue 5327/1: Add scale? predicate and scale->factor function