title: Is there Task Completion info on GitHub Issues API?
body: <p>On GitHub Flavored Markdown you can write something like:</p>
  
  <pre><code>- [ ] Subtask 1
  - [ ] Subtask 2
  - [x] Subtask 3
  </code></pre>
  
  <p>This will render as a list of three checkboxes, the last one checked. That also gives a nice bonus to Issues listing as it includes a progress bar for the given issue:</p>
  
  <p><img src="https://i.stack.imgur.com/DACaR.png" alt="Three issues with progress bar"></p>
  
  <p>Is this present in the GitHub API? If not, how could we achieve that? Only by manually parsing the Issue body? Finally, is there a specific place for requesting API features?</p>