tutoringenddialog now gives options - choose another topic in same level
or go out of level.
one possibly risky change - recordStats no longer calls
parent.recordStats for tutors.
attempt to make tutorgroup proceed linearly from entry point to
endtutordialog but i think this is not fully done.
settingsdialog - uiskin style had to be changed.
dcmotor fixes
fieldmagnitude and field direction prober now replaying - some hacky
code.