title: Watson Conversation API when to use which package?
body: <p>The <a href="https://github.com/watson-developer-cloud/node-sdk" rel="nofollow noreferrer">https://github.com/watson-developer-cloud/node-sdk</a> has been around for a while.  I just noticed <a href="https://www.npmjs.com/package/conversation-extension-framework" rel="nofollow noreferrer">https://www.npmjs.com/package/conversation-extension-framework</a></p>
  
  <p>Any hints on when to use one over the other, please?</p>