lazyload Plugin for jQuery | Zepto

This project is forked from tuupola/jquery_lazyload and add features below:
* Many Details for improve performance;
* IE6/7 support;
* Available with Zepto;
* `vertical_only` \ `minimum_interval` \ `use_minimum_interval_in_ios` \ `no_fake_img_loader` options.

More information on jieyou/lazyload.

Plugin enabled on css background images with fadein effect

Here be dragons.

  <div class="lazy" data-original="img/bmw_m1_hood.jpg" style="background-image: url('img/grey.gif'); width: 765px; height: 574px;"></div>

  $("div.lazy").lazyload({
      effect : "fadeIn"
  });