EntityRepr contains field for Wikipedia title

Fixed compile time errors in WikipediaDocumentSource#fullText (now has returntype string)
Merge remote-tracking branch 'origin/master'

Conflicts:
	src/main/scala/edu/umass/ciir/kbbridge/data/repr/EntityRepr.scala
	src/main/scala/edu/umass/ciir/kbbridge/search/EntityReprRetrieval.scala
Merge remote-tracking branch 'origin/master'
Pushing ksketch classes down, kbbridge now on scala 2.10