title: Share saved game data via game center?
body: <p>I'm trying to figure out if game center is the right tool for me. Here's my situation:</p>
  
  <p>I'm building an app which allows users to create their own musical compositions. I plan to make the compositions exportable and loadable via text file (xml or json format, probably). I'd like to allow users to share their compositions with friends. It seems to me that game kit is the default social network for iOS, so it seems worth looking at. However, the social aspect of game kit seems to be designed mainly for real-time, simultaneous play. Is there any way to share data with friends in a non-realtime way via game center? Is there even a way to send game center contacts a message? </p>