this block will essentially provide an image slideshow
or should this just use the SlideshowContainerBlock mentioned in #25?
why not make a slideshow of any kind of block? its just a block with usually text and image. we could create a specific image+text block that is particularly optimized for the slideshow case - but again could be useful as banner or such outside of a slideshow.
see #25 for that. as mentioned in my comment ... we could decide to skip this ticket and only do #25