Unify Searchers, remove CombinedResult (which was deprecated in favor of ResultSet), and unify scorers
Unify question sources
fix gradle
Rename Resultset to Answer, Engine to Document, and make Document a special kind of Passage
Merge remote-tracking branch 'origin/iss17'

Conflicts:
	src/main/java/uncc2014watsonsim/search/IndriSearcher.java
	src/main/java/uncc2014watsonsim/search/LuceneSearcher.java
Make Researcher to emphasize new passage retrieval path
Setup to allow students to run Google searches
prune all lucee titles begining with list not list of