* Documentation/user/refman.itely:

* Documentation/user/refman.itely:
* Documentation/user/tutorial.itely:
* Documentation/user/music-glossary.tely: Merge changes.

* Documentation/user/glossary.html.in:
* Documentation/index.texi:
* Documentation/header.html.in: Accomodate renaming of glossary.

* Documentation/user/tutorial.itely: Add some glossary references.

* Documentation/user/refman.itely: Minor fixes.

* Documentation/user/lilypond.tely: Add glossary do direntry.

* Documentation/user/music-glossary.tely: Rename (previously:
glossary.tely).  Fix anchor placement.

* Documentation/user/GNUmakefile: Make music-glossary.info too.