Provide anomaly detection guidance for NLP

[rhyolight]

Migrated from NPC-386.

• anomaly detection guidance could be a good idea, it should be easier to do this than prediction
  • after training on sentences from a known corpus of words, feed in nonsense sentences and we should see high anomaly scores (re: syntactic anomalies)
  • several sentences like: "Tom drove a X", where X is a reasonable word, train on lots of values for X, then send unreasonable values to confirm high anomaly scores (re: semantic anomalies)

[rhyolight]

https://github.com/numenta/nupic/wiki/Natural-Language-Processing#predict-part-of-speech-pos-word-type