Fixed NN, Perceptron
Addded perceptron/NaiveNN example/test
Added PowerLaw just for fun.  It'll need some cleaning and adapting into a generic regression framework.
Made using datapoints clearer on PowerLaw
Split off ProbabilityClassifier from Classifier
Updated PowerLaw; refactored rsquared into its own file
Cleaned up HLearn.Models.Classifiers.Common
Removed Ensemble.hs
Refactored FixedBoost into FiniteBoost; updated the interface to v1.0 syntax
refactored test cases out of Bayes file
Merge pull request #1 from mikeizbicki/master

merged