Log Message:
Update to 20020524.

  - Implements ``fuzz'' value for large encodings (defaults to 1%);
    precise heuristics are still used for 8-bit fonts.
  - Implements simple heuristic for distinguishing charcell fonts;
    tested with Courier New (-m-) and Lucida Console (-c-), more testing
    is needed.
  - Empty names are now treated the same as missing, which may (or may
    not) work around some arguably incorrect fonts.
  - Changed big5.eten-0 to big5-0.