Define Score#id index as unique
Remove Score#title index
Add Rack model
Move Score list to a partial
Implement rack CRUD routes and views
Add a button for creating new racks
Add the rack list to the navigation
Link score id to the corresponding rack
Show the rack name on the score pages
Merge branch 'racks'
Change score list to a table

This makes it much more clear and allows showing the score id nicely.