More examples of variable preperation and scoring.  

Extended from the KDD2009 example from Practical Data Science with R
   http://www.practicaldatascience.com/
   (data here: https://github.com/WinVector/zmPDSwR/tree/master/KDD2009 )

Used to support various Win-Vector LLC blog articles such as:
   How do you know if you data has signal?
   http://www.win-vector.com/blog/2015/08/how-do-you-know-if-your-data-has-signal/