Bad performance

[Merri]

On a page with 50 images I get a 150 ms initial processing time on a highend (i7-3770) computer. That is way too much time spent on such a simple task. I didn't go through the JAIL code to see what makes it so slow and instead wrote a simple replacement code to load the images once JS is ready.

Additionally this image loader performs poorly on iPad, it takes a long time for the images to appear once user has scrolled the images to view.