add_to_cart() return $cart_item_key
fixing typos in abstract settings class
Put the whole coupon message in the filter.
Add filter: wc_get_template

Allow 3rd party plugin filter template file from their plugin
Merge pull request #5851 from BFTrick/abstract-settings-typos

Fixing Typos in Abstract Settings Class
Merge pull request #5858 from woothemes/filter-whole-coupon-message

Put the whole coupon message in the filter.
Merge pull request #5872 from Ninos/master

Add filter: wc_get_template
update docblock for add_to_cart() method
Merge pull request #5822 from helgatheviking/fix/add-to-cart

add_to_cart() return $cart_item_key