Handle NOT_FOUND status for Spot requests

I occasionally run into instances where my place detail requests are returning NOT_FOUND using a saved reference. I wanted to rescue from these instances.

I'm not sure why the references no longer work. However, it seems i'm not the only one:

http://stackoverflow.com/questions/17203910/google-places-details-api-call-return-not-found-for-an-existing-autocomplete-ref