Fix typos.
Merge branch 'fix-docs' of https://github.com/waywardmonkeys/scalaz-stream into waywardmonkeys-fix-docs

Conflicts:
	src/main/scala/scalaz/stream/Process.scala
	src/main/scala/scalaz/stream/async/package.scala
	src/main/scala/scalaz/stream/merge/Junction.scala
	src/main/scala/scalaz/stream/merge/JunctionStrategies.scala
	src/test/scala/scalaz/stream/examples/JournaledStreams.scala
Merge branch 'waywardmonkeys-fix-docs'
Test examples in ScalaDoc with sbt-doctest