improve makeWeightedClassesWrapper: Hyperparams for class weighting are now supported, too.
removed fix.factors option from randomForest, but added it in general to makeLearner, so it now works for all learners. Helps when feature factor levels where dropped in newdata prediction data.frames
more consistent results for tuning algorithms and parameters with “trafos” : we always return the optimal settings on the transformed scale, but in the opt.path in the original scale.
fix a bug when feature filtering resulted in a NoFeatureModel
resample now returns a data.frame “err.mgs” or error messages that might have occurred during resampling