Add comments to much of Brushfire core
Merge branch 'master' of github.com:avibryant/brushfire into comment-everything

Conflicts:
	src/main/scala/com/avibryant/brushfire/BinaryLLRLearner.scala
	src/main/scala/com/avibryant/brushfire/BrushfireJob.scala
	src/main/scala/com/avibryant/brushfire/Learner.scala
	src/main/scala/com/avibryant/brushfire/example/IrisJob.scala
Merge pull request #6 from hausdorff/comment-everything

Add comments to much of Brushfire core