cp src/main/scala/rx/lang/scala/Adaptor.scala src/main/scala/rx/lang/Wrapper.scala
mv src/main/scala/rx/lang/Wrapper.scala src/main/scala/rx/lang/scala/
mv src/main/scala/rx/lang/scala/Wrapper.scala src/main/scala/rx/lang/scala/Observable.scala
Scala wrapper which returns Scala Observable