Task2FutureWrapper.scala

  implicit class Task2FutureWrapper[A](task: scalaz.concurrent.Task[A]) {
    import scala.concurrent.{Future, Promise}
    import scalaz.{-\/,\/-}

    def runFuture(): Future[A] = {
      val p = Promise[A]()

      task.runAsync {
        case -\/(t) => p.failure(t)
        case \/-(r) => p.success(r)
      }

      p.future
    }
  }