title: how to handle consumer recovery by offset with shopify sarama
body: <p>I've read that kafka provides a consumer client library that allows recovery by saving the last offset read in zookeeper (not 100% sure about where it's stored).</p>
  
  <p>Is it possible to do the same with Sarama consumers?</p>
  
  <p>Let's say that I'm reading until offset 550, my consumer crashes for 5 min, we are now at offset 700 but I want to resume consuming from offset 550.</p>
  
  <p>Is that possible without having to save the state by myself?
  I would assume it does but I don't understand how.</p>
  
  <p>I've found <code>sarama.OffsetNewest/Oldest</code>but that's not what I'm looking for... </p>