Added a DocumentExtractor that expands Best Entity Mentions across clusters with pronouns.
Merge branch 'master' into corefBestEntityMentionFinding
Added different printer requirements for coref data
Merge branch 'master' into corefBestEntityMentionFinding

Conflicts:
	src/main/scala/edu/knowitall/main/DocOpenIEMain.scala
	src/main/scala/edu/knowitall/tool/document/DocumentExtractor.scala
Added debug flag on CorefDocumentExtactor
Merge pull request #8 from jgilme1/corefBestEntityMentionFinding

Coref best entity mention finding