Show both subjectivity confidence and polarity confidence

[bwbaugh]

Currently we just show the confidence of the most likely class, whether that is objective (neutral) or subjective (positive OR negative).

It might be useful to show the confidences of each subjectivity category, such that if a document is considered objective, in addition to the objective-confidence, we could also show the polarity class and confidence if we were to force the document to be assumed to be of the opposite subjectivity class.