Features:
* Basic information about past workouts can now be viewed (#64)
* Exercises can now have notes (#46)
* New top bar design is now used in all screens (8c952250)

Development:
* Rename WorkoutEditor to WorkoutViewer (cf35ef4c)
* Upgrade dependencies (dcd6ca71, 609c966d, d3008e5f, abd274bb)
* Add room-testing, db schema source set (02423558)
* Ktlint formatting (384e67ec)
