Move trackhub.yaml & trackhub.done to tracks subfolder
'trackhub.yaml' and 'trackhub.done' output files currently clutter the main project folder. They should ideally be moved to the 'tracks' subfolder.
'trackhub.yaml' and 'trackhub.done' output files currently clutter the main project folder. They should ideally be moved to the 'tracks' subfolder.