Added screenshot 1

git-svn-id: https://plugins.svn.wordpress.org/refersion-for-woocommerce/trunk@882487 b8457f37-d9ea-0310-8a92-e5e31aec5664
Update instructions

git-svn-id: https://plugins.svn.wordpress.org/refersion-for-woocommerce/trunk@882489 b8457f37-d9ea-0310-8a92-e5e31aec5664