Debug CoreData context save errors

CoreDataVerboseErrors.m

NSError* error;
if(![context save:&error]) {
	NSLog(@"Failed to save to data store: %@", [error localizedDescription]);
	NSArray* detailedErrors = [[error userInfo] objectForKey:NSDetailedErrorsKey];
	if(detailedErrors != nil && [detailedErrors count] > 0) {
		for(NSError* detailedError in detailedErrors) {
			NSLog(@"  DetailedError: %@", [detailedError userInfo]);
		}
	}
	else {
		NSLog(@"  %@", [error userInfo]);
	}
}