modified readme

git-svn-id: https://plugins.svn.wordpress.org/dk-pricr-responsive-pricing-table/trunk@1003703 b8457f37-d9ea-0310-8a92-e5e31aec5664
readme

git-svn-id: https://plugins.svn.wordpress.org/dk-pricr-responsive-pricing-table/trunk@1003705 b8457f37-d9ea-0310-8a92-e5e31aec5664
readme

git-svn-id: https://plugins.svn.wordpress.org/dk-pricr-responsive-pricing-table/trunk@1003706 b8457f37-d9ea-0310-8a92-e5e31aec5664