Fix ajax calls for adding and deleting order item meta from the backend.
Check products are purchasable when restoring cart

If WC_Product::is_purchasable() is only called when adding a product to the cart,
it's possible to purchase products that aren't purchasable (but were when they were
added to the cart).
Add WC_Cart::get_cart_for_session()
Updated Danish Language files
Allow forwarded hosts for forced SSL
Bracing
Fix variations not showing in all cases for draft products
Fixed field matching in setting up variations
Remove 2.0 tax deprecated arguments #4194
Remove parameters from function as well #4194
Remove safety net for calling WC_Product directly #4194
Soft bumping version to beta-1 #4194
Fixed typo as merged in #4190
Merge pull request #4181 from kloon/fix_order_item_meta_ajax

Fix ajax calls for adding and deleting order item meta from the backend.
Merge pull request #4182 from thenbrent/is-purchasable-check

Check products are purchasable when restoring cart
we jp do use states (closes #4186)
Merge branch 'master' of https://github.com/woothemes/woocommerce
Merge pull request #4189 from w-academy/master

Updated Danish Language files
Merge pull request #4192 from maxrice/http-x-forwarded-host

Allow forwarded hosts for forced SSL
PT Lang + readme