Loading order

Hi! thanks for the plugin. It works very good. I have found a little thing that may be better:

If I have a page with 100 images inside a 4 column grid, when I scroll down if I move fast to the bottom, the plugin starts loading the images that has been left away but not the ones I’m looking on the viewport.

It’s ok but maybe could be good to load only the images on the really-actual viewport and a bit down the viewport (as it does).

Thank you!!