add image id to slideshow item - allow to use newscoop get_img controller with slideshows
add image id to slideshow item - allow to use newscoop get_img controller with slideshows - remove typo
add image id to slideshow item - allow to use newscoop get_img controller with slideshows - simplify code
Merge pull request #396 from ahilles107/improve_slideshows

Improve slideshows in templates