title: kafka-node start consume from last offset
body: <p>I'm using kafka-node to consume messages from a specific Kafka topic. When I restart my node server, it init my consumer as expected, but it's default behavior is to start consume from offset 0 while my goal is to receive only new messages (aka start consume from current offset). I didn't find a way to achieve   that from the API documentation. Anyone knows if its supported? </p>
  
  <p>Thanks!</p>