title: How to get the appID for Facebook and Twitter?
body: <p>I'd like to develop some application that will work with Facebook and Twitter.
  From the API introduction, for example, <a href="https://developers.facebook.com/docs/guides/mobile/" rel="nofollow">https://developers.facebook.com/docs/guides/mobile/</a> for Facebook, the app ID shall be necessary. </p>
  
  <ul>
  <li>How do I get the app ID?</li>
  <li>Shall I input it myself in the .plist?</li>
  <li>Or shall I first get it from somewhere of Facebook or Twitter?</li>
  <li>What is the "somewhere"?</li>
  </ul>