title: The authenticity of host 'bitbucket.org (131.103.20.168)' can't be established
body: <p>In Cloud9 I do:</p>
  
  <pre><code>$ git push -u origin --all
  
  The authenticity of host 'bitbucket.org (131.103.20.168)' can't be established.
  RSA key fingerprint is 97:8c:1b:f2:6f:14:6b:5c:3b:ec:aa:46:46:74:7c:40.
  Are you sure you want to continue connecting (yes/no)?
  </code></pre>
  
  <p>I added the <code>ssh-key</code> from cloud9 to Bitbucket. Shouldn't that be enough to have Bitbucket authenticated by Cloud9?</p>