WooCommerce Chained Products 3.5.0

* New: WooCommerce 3.0 compatible
* New: WooCommerce Subscriptions 2.2.0 compatible
* Fix: UI issue on order screen for WooCommerce less than 3.0
* Fix: When hide out of stock items in checked then the parent product should hide too if chained product is out of stock.
* Fix: Take backorders into consideration for chained products
* Update: Class structure for frontend code
* Update: Will now support only WooCommmerce 2.5+

* Fix: Mini Cart count not getting updated when 'sa_cp_show_chained_items' filter was used
* Fix: Incorrect stock count for variable product
* Fix: Variable product title not getting parsed correctly when used with different language
* Update: Textdomain correction
* Update: POT file