Spanish translation update

Spanish translation extended and improved.
Duplicate capability hook
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
Updated the correct doc block for return type
PayPal button should use 'button' and 'alt' classes. Closes #3096
Updated the return doc block with a brief explanation of the return type.
gitignore
Have the remove_taxes() method set subtotal to subtotal_ex_tax
Make date in Customers Order Notes localized

Added missing localization code to line 37.
new status reporting system

new status reporting system, this plugin list is better visually and
very better to read
Fix for 0 sale price not returning true in is_on_sale
Allow layered nav to work with non pa_ prepended taxonomies
Better backwards compatibility with _woocommerce_exclude_image

@coenjacobs
Merge pull request #3131 from kloon/master

Fix 0 sale price not returning true in is_on_sale
Readme for #3131
Variation Bulk Edit - Increase/Decrease prices by fixed or percentage values
Changed MyException to Exception, no MyException class in WooCommerce
Splitting the CSS #2785