Reload if a setting is changed in the settings app while in background

[malhal]

If the in app settings controller is visible, if you leave the app and go to the Settings app and change a setting, when you come back to the app the settings controller still has the old values. Fix with these changes:

• (void)viewWillAppear:(BOOL)animated {
  ...
  [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(applicationWillEnterForeground:) name:UIApplicationWillEnterForegroundNotification object:nil];
  }
• (void)viewWillDisappear:(BOOL)animated{
  ...
  [[NSNotificationCenter defaultCenter] removeObserver:self name:UIApplicationWillEnterForegroundNotification object:nil];
  }
  -(void)applicationWillEnterForeground:(NSNotification*)notify{
  // reload in settings in case they were changed in the prefs app.
  [[NSUserDefaults standardUserDefaults] synchronize];
  // show any changes if they happened in the background.
  [self.tableView reloadData];
  }