-AnswerAnnotator: refactoring, lower-casing of answer term, adding all
synonyms of answer to a hashset so as to avoid duplicates
-ConceptAnnotator: no real changes
-GoldStandardSingleton: lower-case the original answer as well as the
synonyms
-EvaluatedExactAnswer: removed "static" signature from method
getNumTruePositives in order to allow overriding of super method
-EvaluatedItem: removed "static" signature from method
getNumTruePositives in order to allow overriding of super method
-BioTermExtractor: lower-case the added token; also added method to
check if the token is biological and ignore it if not
-GoPubMedServiceSingleton: no real changes
-Utils: fixed bug in createListFromStringList - if input list is null
also return empty list
Merge branch 'master' of https://github.com/11791-5/project-team5.git