Highlight playback better
Improve open audio click track
Ensure standard default layout is created even if there is a customized layout of the same name
Fix MIDI instruments list
Fix piano staff etc
Revert changes to Scheme error handler and they cause a crash for the CLI with certain input
Move click track name definition to C
Allow user to click on the Click track MIDI notes to set the marked MIDI onset
Move click track name definition to C
Make Play and record MIDI a toggle
fix indentation
Make staff group commands self edit
Fix regression on hidden toggle in Command Center
Warning messages
Temporarily disable the test that checks for unvalid scheme commands since it does not pass any more.
Added documentation building to travis