plan, subgoals --> tutors, childtutors
completing  plan->tutors change
MCQ working in a very bad way.
Added max/min decay for ammeter
cleanup of save/sync profile.
challenge animation changed
cleaned up grouptype color a little.
slightly inconsistent - but next button moved to tutornavigator which is
significant.
crash addressed.
guru package renamed to tutor
renamed domain to topic - for user, that is more meaningful.
internally, domains is distinct from topic now.
left out from prev. commit