what-is-this-thing added to song-library.
Wrap refresh/reset functions in save-excursion.
Fix bug in rendering project songs.
instruments and people files added.
Refactor refreshing functions.
Refactor check of project structure.
Improve project info functions.
Improve project info functionality.
Improve updating arrangement properties.
New song 'Perdido' added to library.
Improve song arrangement table.
Small changes.
First sketck of arrangement to plantuml.
Improve arrangement to plantuml.
Add functions for retrieving song info.
Sketch activities-with-notes diagram constructor.
Further develop note diagram constructor.
Improve PlantUML diagram creation.
Remove comment-cruft.
Simplify plantuml diagram creation.

Use simple part counter instead of chorus calculations.