To do "real soon now"...

1) going back to missed ones automatically
2) putting options to separate window

(done?!) 3) Printing how many total kanji have been selected
      (make GradeChange EXPLICITLY RECOUNT KANJI instead of
       wimping out :-(

(done) 4) telling what is being used as usefile
5) saving REAL record of playing, with run-time start and stop
   of logfile/scoring
6) time limit (user adjustable)

(done) 7) switching between kana/english without changing challenge kanji
8) show meaning of non-"correct" meaning OR kanji

9) save preferences in special rc file
10) randomize between guesskanji and guessenglish!

11) make wrong answers from stroke-similar characters.

12) Clean up code. like loading resources in one go?

13) clen up magic numbers: "9", "4"
BUG?
kdrill -font blah
only changes guess of english buttons, not all buttons.
