title: When does Core Data save the managed object context by itself?
body: <p>I have a OS X 10.9 only, non-document application.<br>
  When i do not call <code>-save:</code> explicitly on my managed object context, when does Core Data call <code>-save:</code> by itself?<br>
  Up to now, i have only found out, that it saves before quitting the application.</p>