* Fold Tap/Drain into Source/Sink
* Create Source/Sink helpers to create all Sources/Sinks
* Make concrete Source/Sink implementations private[scaladsl2]
Missing features are:
+ be able to use all junctions from Java
* re-think akka.stream.javadsl.japi (because variance)
+ better docs
+ enable all tests
+ Partial flow graph as well as GraphFlow tests
+ enabled more FlowTest tests
+ fixed naming of internal classes (no Java in class names)
+ added converters for UndefinedSink/Source
The junit-interface is treating "anything it cannot understand" as a
globbing pattern, thus when it didn't understand ScalaTest options, it
used them for globbing, and of course none of our junit tests matched
the "-oDF" pattern for example.
Debugged this with Stefan and we've opened an issue to improve the
integration in this respect:
https://github.com/sbt/junit-interface/issues/60Resolves#15178
