Set na.action to na.exclude by default
Make documentation for classification trees grouped in 1 Rd file
RMOA now supports the following tree models: AdaHoeffdingOptionTree, ASHoeffdingTree, DecisionStump, HoeffdingAdaptiveTree, HoeffdingOptionTree, HoeffdingTree, LimAttHoeffdingTree, RandomHoeffdingTree, NaiveBayes, NaiveBayesMultinomial