* added `site_url` filter for comment form to keep the current language when submitting a product review
* added filters for cart and checkout buttons in cart widget
* removed deprecated `woocommerce_in_cart_product_title` filter
* compatible up to WordPress 3.8.2

git-svn-id: https://plugins.svn.wordpress.org/im8-qtranslate-woocommerce/trunk@890331 b8457f37-d9ea-0310-8a92-e5e31aec5664