title: Is it possible to fetch data from any site in Chrome App?
body: <p>I am new to Chrome App development. I was going to create a simple RSS reader as a helloworld project, but now, after reading docs, I am not sure that this is possible. The problem is, by the Content Security Policy for Chrome Apps it is forbidden to use domain in url_handlers without proving that this is your domain.
  It makes retrieving RSS from sites impossible.</p>
  
  <p>But there are references to some sandbox technology in the docs, and Chrome Apps can use low-level sockets. Can I somehow use it to get RSS from any site?</p>