Final version of Naive Bayes features -> logistic regression.  Trying
the most useful 20 words didn't do much, so I dropped it.
Moved most of the .h files to include subdirectory
New version of Array.h builds but has bugs
Merge branch 'master1' of github.com:dmgoldschmidt/code into master1

Conflicts:
	Course_Notes_NB.ipynb