title: Returning images through AWS API Gateway
body: <p>I'm trying to use AWS API Gateway as a proxy in front of an image service.
  I'm able to get the image to come through but it gets displayed as a big chunk of ASCII because Content-Type is getting set to "application/json".</p>
  
  <p>Is there a way to tell the gateway NOT to change the source Content-Type at all?</p>
  
  <p>I just want "image/jpeg", "image/png", etc. to come through.</p>