#4.6.1
-- use ordered logistic regression for ordinal variables in irmi
#4.6.0
-- new option for kNN 'weightDist' to use the distances for the k nearest neighbours as weights
-- Bytecompile is enabled
-- The R function which.minN is not used anymore, instead there is a C++ function, kNN is now about 1.6 times faster on
a replication (100x) of the sleep dataset
#4.4.0
-- bugfix wrong observations marked as imputed in the hotdeck function
-- random sorting is now used in hotdeck if no ord_var is defined
#4.2.3
-- bugfix for the computation of distances for ordered variables
#4.2.1
-- new option for kNN 'useImputedDist' if the imputed values of a variable should be used in subsequent imputation of another variable.
#4.2.0
-- bug fixed in irmi with newer version of nnet (multinom) and if residual scale can not be computed (noise)
-- Improvement Gower dist with only missing values in data.x or data.y
#4.1.0
-- new parameter modelFormula in irmi
-- bug fixes in irmi
-- updated hotdeck based on data.table -> faster and quite stable
-- bug fix if range of a variable is 0 in gower.dist
-- small fixed kNN
#4.0.1
-- small bugfix for using makeNA in kNN
-- "Nothing to impute"-Error is now a warning
-- imp_var now updates existing TF imp_vars (with warning)
#4.0.0
-- new pacakge VIMGUI contains all GUI functions
-- vignettes moved to VIMGUI
-- new imputation function regressionImp
-- roxygen style comments -> help files