title: Custom JodaTime serializer using Play Framework's JSON library?
body: <p>How do I implement a custom JodaTime's DateTime serializer/deserializer for JSON? I'm inclined to use the Play Framework's JSON library (2.1.1). There is a default DateTime serializer, but it uses <code>dt.getMillis</code> instead of <code>.toString</code> which would return an ISO compliant String.</p>
  
  <p>Writing Reads[T] amd Writes[T] for case classes seems fairly straightforward, but I can't figure out how to do the same for DateTime.</p>