Fix tee - ensure that Kill from the outside is not swallowed
Make handling of Emit in pipe similar to tee
Merge branch 'append4-final' of github.com:Spinoco/scalaz-stream into spinoco/master

Conflicts:
	src/main/scala/scalaz/stream/Process.scala
Merge branch 'append4-final' of github.com:Spinoco/scalaz-stream into spinoco/master