Merge pull request #12 from andrie/master

Merge pull request #4 from RevoEnhancements/master
Merge pull request #13 from andrie/master

Merge changes from adding rxUnique
Merge pull request #14 from andrie/master

Added rxMoments to compute moments, skewness and kurtosis
Merge pull request #15 from andrie/master

Fixed bug in rxMoments
Added rxCFS.R for correlation feature selection
Added woe() to calculate weight-of-evidence and information value
Merge pull request #17 from andrie/Correlation-feature-selection

Correlation feature selection
Merge pull request #5 from RevoEnhancements/naive-bayes

Naive bayes