title: Kafka: copy topics between different versions?
body: <p>I've got two brokers. the first runs 0.9 and the second runs 0.10</p>
  
  <p>Various workers and daemons consume and produce messages on both brokers.</p>
  
  <p>For one application, I need messages from  a 0.9 topic consumable from an application that's using <code>KStreams</code> and is connected to the 0.10 broker.</p>
  
  <p>Is there a straightforward way of copying just the one topic from 0.9 to 0.10? Or using the 0.10 clients to connect to 0.9? I'd hate to have to resort to cramming both versions in the same jar. Just consuming the 0.9 broker with a 0.10 client doesn't seem to work.</p>