Update to version 3.0.4.0

git-svn-id: https://plugins.svn.wordpress.org/purple-xmls-google-product-feed-for-woocommerce/trunk@979199 b8457f37-d9ea-0310-8a92-e5e31aec5664
Minor fix: .js issue

git-svn-id: https://plugins.svn.wordpress.org/purple-xmls-google-product-feed-for-woocommerce/trunk@979526 b8457f37-d9ea-0310-8a92-e5e31aec5664