title: Either[A, Future[B]] to Future[Either[A, B]]
body: <p>Is there a way to convert a</p>
  
  <pre><code>Either[A, Future[B]] 
  </code></pre>
  
  <p>to a </p>
  
  <pre><code>Future[Either[A, B]]
  </code></pre>
  
  <p>I have in mind something like the <code>Future.sequence</code> method which converts from a <code>List[Future]</code> to a <code>Future[List]</code></p>