Sort option

Hi !
I love your plugin, but I haven’t found a way to sort the photos as I want when I do a tag search (I use tag to make mini-albums of my trips), so I edit your code this way :

else if ($action === 'tag') {
		$photos = $f->photos_search(array(
			'user_id' => $user_id,
			'tags' => $tags,
			'tag_mode' => $tags_mode,
			'extras' => $extras,
			'per_page' => $max_num_photos,
		/*ADDED BY ME*/'sort' => 'date-taken-asc',
			'page' => $page_num
		));

I think it could be a cool upgrade features to have a selector in the settings to choose how to sort the results.

MJ