add devise registration routes scoped to staff
change redirect on ensure_staff! method
generate staff/users controller
move ensure_staff! method to application controller
add view for new locations
add view for edit locations
add view for index locations
add form for new/edit locations
update new/edit views to render form for locations
update index view to list locations
add validation to location model to require presence of a name
add links to staff dashboard for adding/listing locations
fix broken form in locations form
fix indentation in locations form
add show action to locations controller
add show view for locations
fix code style
cleanup code style
add show action and fix index action to cohorts controller
refactor routes