updated for sentiment analysis changes
made the sentiment analysis work.

This is not as clean as could be hoped.  When using the main
(edu.stanford.nlp.pipeline.StanfordCoreNLP) class, the Stanford NLP
package only outputs sentiment analysis information into xml output,
not to stdin in the interactive mode.  One has to use the
edu.stanford.nlp.sentiment.SentimentPipeline class which has a
different output format, requiring different parsing/handling.