add installation script for R Machine Learning packages
add installation script for R Machine Learning packages

ChicagoBoothAnalytics/HelpRFun,ChicagoBoothAnalytics/HelpRFun,ChicagoBoothAnalytics/HelpRFun,ChicagoBoothAnalytics/DataWrangling_inR,ChicagoBoothAnalytics/DataWrangling_inR,ChicagoBoothAnalytics/DataWrangling_inR