remove unused function
use jQuery for attaching the window.scroll event, since we're already using jQuery
do not run jQuery stuff on every scroll event
loose references of already processed boxes to speed up future loops
remove unused state variable
update comments
rm extra newline
use @ for consistency
updated minified js (forgot to do this in previous commits)
Merge pull request #13 from attilaolah/faster-scroll-callback

Faster scroll callback