• User-supplied transformations can return a vector which is coerced to matrix(..., ncol = 1) internally.
• ytrafo and xtrafo may take functions like rank() directly. However, the use of trafo() is recommended.
• Argument teststat may take values "max", "quad" or "scalar".
• Internal reimplementation of score handling for ordered factors.
• Handling of multiple ordered factors / ordered factors in multivariate situations implemented.
• f_trafo() returns a design matrix with NA rows in case missing values were present.