Fix issue with double s in checkout URI. #2348
Added total and subtotal values to some ajax returns

Added total value to ajax return when adding or removing item from cart,
and subtotal value when updating item quantity.
In case discounts are already applied we need both total and subtotal
values returned for these actions.
Missing comma to previous push
Merge pull request #2349 from somewebmedia/master

Added total and subtotal values to some ajax returns
Update test_remove_item_from_cart() for #2349
Merge branch 'master' of github.com:easydigitaldownloads/Easy-Digital-Downloads
Add additional discount actions. #2240
Minify global checkout JS
Check if failure_page is empty before proceeding in edd_listen_for_failed_payments(). #2353