Hover state for play button
Clean up select styling
Style volume range slider
Bottom margin for play bar
Update colors and font settings for the piano roll
Move note up and down
Restore playbar and fix wrapping on part list
Upgrade ember to avoid metamorphs

Thanks @vicramon!
Better part index layout
Fix measure line wrapping
Rework summary playbar
Extract playbar component and reuse on part route
tart up projections
ag friendly gitignore
Play with rolling schedule buffer
repeat parts OMG
cleanup
Change buffer strategy: Scoot notes into future
Add sinon
add test for loops