Issue 3457: Add snippet `Using \partcombine with lyrics'. (issue 11328043)

[markpolesky]

Reviewers: ,

Message:
Hi folks,

here's a patch that adds a new snippet to NR "Automatic part combining":
my workaround to get \partcombine to work with lyrics.  Is the texidoc
too long?  Should I leave out how it works?

http://code.google.com/p/lilypond/issues/detail?id=3457

Thanks
- Mark

Description:
Add snippet `Using \partcombine with lyrics'.

Also run makelsr.py, and add reference in NR "Automatic part combining".

Please review this at https://codereview.appspot.com/11328043/

Affected files:
  M Documentation/notation/simultaneous.itely
  A Documentation/snippets/new/using-partcombine-with-lyrics.ly
  M Documentation/snippets/simultaneous-notes.snippet-list
  A Documentation/snippets/using-partcombine-with-lyrics.ly
  M Documentation/snippets/vocal-music.snippet-list
  M Documentation/snippets/workaround.snippet-list