title: How to code review "new" repository in github
body: <p>I want to review code that is totally new. But, I am unable to create a pull request, nor I am able to add a comment.</p>
  
  <p>Does github supports reviewing code for only changes to existing repositories? What if it is a new repository built only on master? Can someone get code review through Github for a totally new repository and have others comment on it? </p>