add support of per element options (blankImage, classNojs, srcAttr, edgeX, edgeY, visibleOnly)
add support of per element options (blankImage, classNojs, srcAttr, edgeX, edgeY, visibleOnly)

kavallo/lazy-load-xt,masterweb121/lazy-load-xt,patricknelson/lazy-load-xt,ressio/lazy-load-xt,ProxiBlue/lazy-load-xt,patricknelson/lazy-load-xt,kavallo/lazy-load-xt,josephtan/lazy-load-xt,josephtan/lazy-load-xt,masterweb121/lazy-load-xt,ProxiBlue/lazy-load-xt,ressio/lazy-load-xt,palimadra/lazy-load-xt,palimadra/lazy-load-xt