title: App Store API for release notes / updates
body: <p>Is there any way to retrieve the following information from the Apple (iOS) App Store: </p>
  
  <p>a) the time and date an app from the app store has been updated 
  b) retrieve release notes from the latest update</p>
  
  <p>Is there an API for this? RSS? Or even an existing service that already provides this? </p>
  
  <p>I would like to keep track of new updates of interesting apps, but don't want them always on my iPhone or check with iTunes on Mac.</p>