Media Grid - Wordpress Responsive Portfolio 7.4.0

- fixed: removed functions in empty() PHP function (FYI: you should update server's PHP version)

N/A Changelog for v6.052

- added: shortcode parameter to set custom mobile treshold - added: option to use WooCommerce product attribute variations in lightbox - added: direct FB sharing using an APP ID - updated: TimThumb script - fixed: grid resizing script - fixed: WPLANG constant in Facebook Comments