Scalaz typeclasses <~> Playframework2 typeclasses
libraryDependencies += "com.github.xuwei-k" %% "play2scalaz" % "0.12.0"
see https://github.com/xuwei-k/play2scalaz/tree/0.7.x
see https://github.com/xuwei-k/play2scalaz/tree/0.6.x