* src/main/java/jgreg/internship/nii/RES/Article.java,
src/main/java/jgreg/internship/nii/AE/SentimentAnnotator.java:

Small trick to avoid multiple loops (there is probably a better way than
`instanceof` in java8).
* src/main/java/jgreg/internship/nii/WF/Pipeline.java: Rename some files
* src/main/java/jgreg/internship/nii/AE/SentimentStatisticsAE.java: Extract some stats
* src/main/java/jgreg/internship/nii/WF/Pipeline.java: Use the new stats tool
* src/main/java/jgreg/internship/nii/AE/SentimentMatcherAE.java: Optimization

Make one pattern from all patterns instead of trying each of them one by
one.

edu.stanford.nlp.ling.tokensregex.TokenSequenceMatcher.find()
Before: 680.221ms 71.5%
After: 238.053ms 47.5%