scalaz/scalaz — pull request #406 by xuwei-k (2013-06-25 18:23:58+00:00)
Title: cleanup StreamT instances

1. remove `StreamTMonad`. it is unnecessary because `StreamTMonad` and `StreamTMonadPlus` requires same typeclass. (like ListT)
2. relaxed `StreamTMonadPlus` constraint. (Monad to Applicative)