Prototype of multilabel ferns.
Refactoring to clean things up.
Fixed bug that was elevating score values by a small constant.

Raw score values will change after this fix, but the predictions and importance scores do not.
Old models will predict the same way as before.
Merge branch 'master' into multilabel

Conflicts:
	src/fern.h
Merge with the refactoring on master fully integrated.
Deeper into a sea of changes.
More integration changes.

Side-src tester with example musical data (which works), some changes in R-C integration, fixed bug in a formula, docks updates, stuff.
Even more integration.

Model is done from R, but conversion back is broken.
Model making seems to work.

Next step is prediction.
Multilabel prediction works.
Started 0.3.2 version.
Merge branch 'multilabel'
NEWS update.
2014.

Plus a minor README update.