=hco #15665 fix BoyerMoore for byte values > 0x7f

This also converts tests to run over a binary alphabet instead of over
plain alphanumeric chars.
=htc #15560 close entity data stream eagerly + add more tests
=htc #15686 fix off-by-one error when creating strict entities for small payloads
= str - #15618 - Renames Flow and Duct 'tee' operation to 'broadcast'
!str #15479 "Rename ActorPublisher.Request parameter

* n is the name used in reactive streams
!str #15076 Make foreach a terminal operation, returning Future[Unit]
+str #15408 Replace uncheckedVariance annotations in Flow/Duct
+str #15695 Add support for UDP server streams
Update version for release akka-stream-and-http-experimental-0.4
dtls and sdp prototyping