Skype update text contains next:
App auto restarts if unexpectedly shut down
How is possible to perform that via SDK?
The question is why would you want do that?, if your answer is: you want to make an app to run in an "iPad Kiosk" so in case it crashed you need the app to automatically restart, then, what will work for you is put the iPad in "Kiosk mode" and the OS automatically restarts the app in case of crashes.
Take a look at:
http://www.webascender.com/Blog/ID/447/How-to-Setup-Kiosk-Mode-Lock-Your-iPad-to-Just-One-App
Cheers,