title: XMLHttpRequest does not work in a Chrome app
body: <p>I am new to XMLHttpRequest and JavaScript and all this stuff.<br>
  I made a gopro WiFi app to control gopro cameras with XMLHttpRequest, but it does not work with the packaged Chrome app, it works with the HTML file in Chrome.<br>
  <a href="https://github.com/KonradIT/HeroProApp/tree/gh-pages/Chrome" rel="nofollow">Source</a><br>
  Any ideas? </p>