deleted InvestmentCalculatorTest.java
added haveSameElements(), contains(), and addition listToString() methods to ListArrayUtil, and some unit tests
added 2 findNumDiffs() methods to ListArrayUtil
added sum, summary, and sequence methods to MathUtil
added getRowsAsLists to CSVReader
added getKullbackLeiblerDivergence to Shannon, as well as a lot of unit test code
added int[] constructor and getCountOf to Histogram
ProbDist tweaks
added calls to logger.removeAllAppenders() in getLogger functions so that repeated calls to those functions would not result in loggers that print the same line multiple times instead of once