Log Message:
Update to 294:

294
  Fixed bug in which unicode strings in caledar output would not
  be displayed properly.

293
  Fixed bug in repetitions with overdue = s in which a task more
  than one repetition past due resulted in an endless loop.

292
  Fixed gui bug in which pressing F1 after p would crash. Also bug
  involving single = signs in data.py year2string().

291
  Fixed weather.py to only show chill when different than temp and
  to only show calm when wind speed is zero.