add link for Java 7 JavaDoc
add link for Java 7 JavaDoc

linjunleo/lenskit,vaibhav345/lenskit,martinlaz/lenskit,tajinder-txstate/lenskit,kluver/lenskit,blankazucenalg/lenskit,amaliujia/lenskit,blankazucenalg/lenskit,linjunleo/lenskit,vaibhav345/lenskit,kluver/lenskit,tajinder-txstate/lenskit,kluver/lenskit,martinlaz/lenskit,vaibhav345/lenskit,kluver/lenskit,amaliujia/lenskit,chrysalag/lenskit,vaibhav345/lenskit,binweiwu/lenskit,binweiwu/lenskit,kluver/lenskit,chrysalag/lenskit,tajinder-txstate/lenskit,tajinder-txstate/lenskit