Making all new classes package private

core/src/main/scala/spark/deploy/JsonProtocol.scala

...c/main/scala/spark/deploy/master/ui/ApplicationPage.scala

core/src/main/scala/spark/deploy/master/ui/IndexPage.scala

core/src/main/scala/spark/deploy/master/ui/MasterWebUI.scala

core/src/main/scala/spark/deploy/worker/ui/IndexPage.scala

core/src/main/scala/spark/deploy/worker/ui/WorkerWebUI.scala

core/src/main/scala/spark/ui/JettyUtils.scala

core/src/main/scala/spark/ui/SparkUI.scala

core/src/main/scala/spark/ui/jobs/IndexPage.scala

core/src/main/scala/spark/ui/jobs/StagePage.scala

core/src/main/scala/spark/ui/storage/BlockManagerUI.scala

core/src/main/scala/spark/ui/storage/IndexPage.scala

core/src/test/scala/spark/ui/UISuite.scala