Trivial implementation of: 
  http://www.win-vector.com/blog/2011/09/the-simpler-derivation-of-logistic-regression/

Used to demonstrate divergence of Newton-Raphson step when solving a logistic regression.

Depends on:
 COLT library: http://acs.lbl.gov/software/colt/
 Junit: http://www.junit.org

In support the following articles:
   http://www.win-vector.com/blog/2012/08/how-robust-is-logistic-regression/   
   http://www.win-vector.com/blog/2012/08/newton-raphson-can-compute-an-average/