Added http/2 push feature.
Added capability to handle responsive images and iframes to the Lazy-load feature.
Improved efficiency of caching policy of static assets.
Removed font-face from combined CSS file when Optimize CSS Delivery is enabled.
Other minor bug fixes and improvement.
* Fixed issue with plugin not running on some sites with last version
* Added ability to mark and skip images already optimized in subfolders [PRO VERSION]
* Fixed issue with autoupdate of PRO version reverting to FREE version [PRO VERSION]