o svmOpt sigma defaults changed from 10^(-2:3) to 10^(-3:2)
   [2014-08-15 Fri]
 o in xxxOptimisation, the best parameter(s) for the validation
   classification runs are now chosen at random instead of using the
   first best param (see change in pRoloc:::getBestParam that got a
   sample argument defaulted to TRUE) [2014-08-15 Fri]
 o When calculating macroF1 scores (xval and validation), NAs are set