Request Delegate

Not useless, without parentheses `error` will be assigned the companion object itself.
>[error] /Users/tabdulradi/Workspace/cloud9ers/really/really-core/src/main/scala/io/really/RequestDelegate.scala:36: No Json serializer found for type io.really.CommandError.InternalServerError.type. Try to implement an implicit Writes or Format for this type.
[error]         replyWith(Json.toJson(error).as[JsObject])