GDP: rearrange manual

[Graham Percival]

Despite me being fairly happy with out table of contents, I think we
could still improve the arrangement of subsections.  Here's my proposal.

LIMITED DISCUSSION
To keep discussion focused and as un-confused as possible, this is a
discussion *only* about the arrangement of subsections.  Other parts of
GDP will be discussed later.

This means:
- propose new/changed chapter/sections
- propose renamings of chapter/sections
- *do not* discuss new subsections or renamings of subsections.  That
 will come later.

GENERAL IDEAS
- the manual will be split even more into Learning Manual / Notation
 Reference.  This is the notation reference, so we assume that users
 have read the LM.  They know about music expressions, \override, etc.
 The LM will be increased to accomodate for this, but that's a separate
 discussion.


   * 6 Basic musical notation
         o 6.1 Pitches
               + 6.1.1 Normal pitches
               + 6.1.2 Accidentals
               + 6.1.3 Cautionary accidentals
               + 6.1.4 Micro tones
               + 6.1.5 Note names in other languages
               + 6.1.6 Relative octaves
               + 6.1.7 Octave check
               + 6.1.8 Rests
               + 6.1.9 Skips 
         o 6.2 Affecting multiple pitches
               + 6.2.1 Clef
               + 6.2.2 Key signature
               + 6.2.3 Transpose
               + 6.2.4 Instrument transpositions
               + 6.2.5 Ottava brackets 
         o 6.3 Rhythms
               + 6.3.1 Durations
               + 6.3.2 Augmentation dots
               + 6.3.3 Tuplets
               + 6.3.4 Scaling durations
               + 6.3.5 Automatic note splitting
               + 6.3.6 Aligning to cadenzas 
         o 6.4 Meter
               + 6.4.1 Time signature
               + 6.4.2 Partial measures
               + 6.4.3 Unmetered music
               + 6.4.4 Polymetric notation (alternating)
               + 6.4.5 Polymetric notation (simultaneous)
               + 6.4.6 Time administration
               + 6.4.7 Proportional notation (introduction)
               + 6.4.8 Automatic beams
               + 6.4.9 Manual beams
               + 6.4.10 Feathered beams 
         o 6.5 Bars
               + 6.5.1 Bar check
               + 6.5.2 Barnumber check
               + 6.5.3 Multi measure rests
               + 6.5.4 Bar lines
               + 6.5.5 Bar numbers
               + 6.5.6 Rehearsal marks 
         o 6.6 Polyphony
               + 6.6.1 Chords
               + 6.6.2 Stems
               + 6.6.3 Basic polyphony
               + 6.6.4 Explicitly instantiating voices
               + 6.6.5 Collision resolution
               + 6.6.6 Clusters
               + 6.6.7 Automatic part combining
               + 6.6.8 Writing music in parallel 
   * 7 Decorating musical notation
         o 7.1 Connecting notes
               + 7.1.1 Ties
               + 7.1.2 Slurs
               + 7.1.3 Phrasing slurs
               + 7.1.4 Laissez vibrer ties
               + 7.1.5 Grace notes
               + 7.1.6 Analysis brackets 
         o 7.2 Expressive marks
               + 7.2.1 Articulations
               + 7.2.2 Dynamics (absolute)
               + 7.2.3 Dynamics (crescendi)
               + 7.2.4 Breath marks
               + 7.2.5 Trills
               + 7.2.6 Glissando
               + 7.2.7 Arpeggio
               + 7.2.8 Falls and doits 
         o 7.3 Staff notation
               + 7.3.1 System start delimiters
               + 7.3.2 Staff symbol
               + 7.3.3 Hiding staves
               + 7.3.4 Metronome marks
               + 7.3.5 Instrument names
               + 7.3.6 Quoting other voices
               + 7.3.7 Formatting cue notes 
         o 7.4 Repeats
               + 7.4.1 Repeat types
               + 7.4.2 Repeat syntax
               + 7.4.3 Repeats and MIDI
               + 7.4.4 Manual repeat commands
               + 7.4.5 Tremolo repeats
               + 7.4.6 Tremolo subdivisions
               + 7.4.7 Measure repeats 
         o 7.5 Educational use
               + 7.5.1 Balloon help
               + 7.5.2 Fingering instructions
               + 7.5.3 Blank music sheet
               + 7.5.4 Grid lines
               + 7.5.5 Shape note heads
               + 7.5.6 Easy Notation note heads 
         o 7.6 Special use
               + 7.6.1 Special noteheads
               + 7.6.2 Improvisation
               + 7.6.3 Selecting notation font size
               + 7.6.4 Hidden notes
               + 7.6.5 Coloring objects
               + 7.6.6 Parentheses 
   * 8 Instrument-specific notation
         o 8.1 Piano music
               + 8.1.1 Pedals
               + 8.1.2 Automatic staff changes
               + 8.1.3 Manual staff switches
               + 8.1.4 Staff switch lines
               + 8.1.5 Cross staff stems 
         o 8.2 Chord names
               + 8.2.1 Introducing chord names
               + 8.2.2 Chords mode
               + 8.2.3 Printing chord names
               + 8.2.4 Figured bass 
         o 8.3 Rhythmic music
               + 8.3.1 Showing melody rhythms
               + 8.3.2 Entering percussion
               + 8.3.3 Percussion staves
               + 8.3.4 Ghost notes 
         o 8.4 Guitar
               + 8.4.1 String number indications
               + 8.4.2 Tablatures basic
               + 8.4.3 Non-guitar tablatures
               + 8.4.4 Banjo tablatures
               + 8.4.5 Fret diagrams
               + 8.4.6 Right hand fingerings
               + 8.4.7 Other guitar issues 
         o 8.5 Bagpipe
               + 8.5.1 Bagpipe definitions
               + 8.5.2 Bagpipe example 
         o 8.6 Bowed strings
               + 8.6.1 Artificial harmonics 
         o 8.7 Ancient notation
               + 8.7.1 Ancient note heads
               + 8.7.2 Ancient accidentals
               + 8.7.3 Ancient rests
               + 8.7.4 Ancient clefs
               + 8.7.5 Ancient flags
               + 8.7.6 Ancient time signatures
               + 8.7.7 Ancient articulations
               + 8.7.8 Custodes
               + 8.7.9 Divisiones
               + 8.7.10 Ligatures
                     # 8.7.10.1 White mensural ligatures
                     # 8.7.10.2 Gregorian square neumes ligatures 
               + 8.7.11 Gregorian Chant contexts
               + 8.7.12 Mensural contexts
               + 8.7.13 Musica ficta accidentals 
   * 9 Text
         o 9.1 Text in a score
               + 9.1.1 Text scripts
               + 9.1.2 Text and line spanners
               + 9.1.3 Text spanners
               + 9.1.4 Text marks 
         o 9.2 Text markup section
               + 9.2.1 Text markup
               + 9.2.2 Nested scores
               + 9.2.3 Page wrapping text
               + 9.2.4 Overview of text markup commands
               + 9.2.5 Overview of text markup list commands
               + 9.2.6 Font selection
               + 9.2.7 New dynamic marks 
         o 9.3 Vocal music
               + 9.3.1 Setting simple songs
               + 9.3.2 Entering lyrics
               + 9.3.3 Aligning lyrics to a melody
                     # 9.3.3.1 Automatic syllable durations
                     # 9.3.3.2 Another way of entering lyrics
                     # 9.3.3.3 Assigning more than one syllable to a
                     # single note
                     # 9.3.3.4 More than one note on a single syllable
                     # 9.3.3.5 Extenders and hyphens 
               + 9.3.4 Working with lyrics and identifiers
               + 9.3.5 Flexibility in placement
                     # 9.3.5.1 Lyrics to multiple notes of a melisma
                     # 9.3.5.2 Divisi lyrics
                     # 9.3.5.3 Switching the melody associated with a
                     # lyrics line
                     # 9.3.5.4 Lyrics independent of notes 
               + 9.3.6 Spacing lyrics
               + 9.3.7 More about stanzas
                     # 9.3.7.1 Adding stanza numbers
                     # 9.3.7.2 Adding dynamics marks
                     # 9.3.7.3 Adding singer names
                     # 9.3.7.4 Printing stanzas at the end
                     # 9.3.7.5 Printing stanzas at the end in multiple
                     # columns 
               + 9.3.8 Ambitus
               + 9.3.9 Other vocal issues 
         o 9.4 Titles and headers
               + 9.4.1 Creating titles
               + 9.4.2 Custom titles
               + 9.4.3 Reference to page numbers
               + 9.4.4 Table of contents 
   * 10 Input and output
         o 10.1 Input files
               + 10.1.1 File structure (introduction)
               + 10.1.2 File structure
               + 10.1.3 A single music expression
               + 10.1.4 Multiple scores in a book
               + 10.1.5 Extracting fragments of notation
               + 10.1.6 Including LilyPond files
               + 10.1.7 Different editions from one source
               + 10.1.8 Text encoding 
         o 10.2 MIDI output
               + 10.2.1 Creating MIDI files
               + 10.2.2 MIDI block
               + 10.2.3 MIDI instrument names 
         o 10.3 Displaying LilyPond notation
         o 10.4 Skipping corrected music 
   * 11 Changing defaults