Move set stat calculation into the model
Move Workout/Exercise components into the workout module
Implement workout editing

- Add new exercises and exercise sets
- Delete exercise sets
Add ability to render workouts without edit forms
Route /workout/:id to react view
Delete unused old render code
Add today's workout listing view

- delete a bunch of cruft
- drop Model from model class names
Move public view checkbox into Workout
Remove unused bootstrap js dependency
Delete old model code
delete unused html file
Hookup readonly flags to current login state

Set readonly flag based on login state & whether we're viewing a
public workout not owned by currently logged in user.
Migrate settings stub to react