move commented-out example from TestScheduler to separate file TestSchedulerExample
restore package.scala files (mainly for scaladoc)
update package objects
PublishSubject.apply() does not take a parameter
@Ignore RxScalaDemo
private vars in Scala do not start with underscore
restore CompletenessTest
examples to examples, tests to tests
replace Assert.assertXxx by assertXxx
move rx.lang.scala.subscriptions.Subscription to rx.lang.scala.Subscription (mirror Java package structure)
reactivate Observable.withFilter