title: AssetLibrary not return all assets with "ALAssetsGroupAll"
body: <p>I am querying the asset library with the following code</p>
  
  <pre><code>ALAssetsLibrary *assetsLibrary = [self defaultAssetsLibrary];
  [assetsLibrary enumerateGroupsWithTypes:ALAssetsGroupAll usingBlock:^(ALAssetsGroup *group, BOOL *stop) {
      NSMutableArray *tmpAssets = [@[] mutableCopy];
      [group enumerateAssetsUsingBlock:^(ALAsset *result, NSUInteger index, BOOL *stop) {
          if(result)
          {
              [tmpAssets addObject:result];
          }
      }];
  
      NSSortDescriptor *sort = [NSSortDescriptor sortDescriptorWithKey:@"date" ascending:NO];
      finished([[tmpAssets sortedArrayUsingDescriptors:@[sort]]  mutableCopy]);
  
  } failureBlock:^(NSError *error) {
      finished(@[]);
      NSLog(@"Error loading images %@", error);
  }];
  </code></pre>
  
  <p>However it seems that I am not getting all of the assets, if I add images to the iPhone from an external source these are not showing in the list of assets received from the above code... I am getting what seems like everything else though. I suspected it could be a limitations of the framework but when I use instagram I noticed that the photos which were missing in my app were visible... How do i get every type of asset "ALAssetsGroupAll" not enough?</p>