Changes in 0.3.2:
 - Prototype of a multi-label classification.
 - Removed redundant constant from scores definition; score values will
 be different, but the importance scores and prediction results will be
 the same as generated by previous versions.

Changes in 0.3.1:
 - predict method for rFerns returns OOB votes/scores when no predictors
 are given.

Changes in 0.3:
 - Handling of unbalanced classes.
 - Performance tweaks.

Changes in 0.2:
 - Added support for integer and ordered-factor attributes, suggested by
 Bill Venables.

Changes in 0.1:
 - First public release.
