Changes that will affect to existing users

r988 (2013/11/3)

output value format is changed.
  Previous output is available as an item of $stat
  This change is to enable replay by previous output.

r985 (2013/11/2)

name.on.axis=TRUE is to show labels by abbreviation (a, b, c, ...).
  Previously, the value was to show labels by full name.
  To do the same, name.on.axis=NULL or =factor.labels must be specified.
  The default action is unchanged, showing full names.
  The roll of FALSE is unchanged.
  This change is to make the action compatible to factor.labels.

