Observable.sample(Observable) in Scala
tweak RxScalaDemo (and Olympics example)
some RxScalaDemo tweaks
add Subscriber and Observable creation from `Subscriber[T] => Unit`
Merge branch 'master' of github.com:Netflix/RxJava into scala-additions
deprecate rx.lang.scala.Observable.create[T](Observer[T]=>Subscription)
Merge pull request #923 from samuelgruetter/scala-additions

Observable creation from Subscriber[T]=>Unit for Scala