Merge pull request #3103 from kloon/master

esc_js translatable strings for the JS
Readme with #3103
Merge pull request #3105 from kloon/master

esc_js ify WooCommerce
Update public parameters for 'product_variation' and 'shop_coupon' CPTs

Update 'public' parameters for 'product_variation' and 'shop_coupon' to 'false' and update 'query_var' parameter for 'product_variation' to false.
Merge pull request #3111 from krogsgard/master

Update CPT parameters for 'product_variation' and 'shop_coupon'
Readme update with #3111
PayPal button should use 'button' and 'alt' classes. Closes #3096
gitignore
Have the remove_taxes() method set subtotal to subtotal_ex_tax
Fix for 0 sale price not returning true in is_on_sale