Refactored b-cubed evaluation code somewhat.
Generisised candidate generator code so it works with arbitrary query and link types
Generisised Linker interface so it can be used outside tac
Generisised candidate ranking code
Fixed a number of compile error intriduced by previous changes
Moved reducer to the lib package
Moved some classes in the lib package to signify they arn't specificly related to NEL
Moved the stanford style entity link annotator to the snlp package
Added a linker which decomposes the operation to generation the ranking
Added batch linking