Convert to 2.18.2, some adjustments to vertical spacing
midi: Use choir aahs for melody
Update to LilyPond 2.18.2
Add a separate dynamics context to fix midi
Midi vocals get "choir aahs"
Update to LilyPond 2.18
Merge branch 'morelandc-436' of https://github.com/glenl/The-Mutopia-Project
Header tweaks
Merge branch 'claribel-437' of https://github.com/glenl/The-Mutopia-Project
Header tweaks
Merge branch 'bishophr-435' of https://github.com/glenl/The-Mutopia-Project
Header tweaks