title: What's the equivalent of hoistEither in scalaz?
body: <p>What's the equivalent of <code>hoistEither :: Monad m =&gt; Either e a -&gt; EitherT e m a</code>?</p>
  
  <p>I have an <code>\/[E, A]</code> and I'd like to get a <code>EitherT[M[_],E,A]</code></p>