modified readme.

git-svn-id: https://plugins.svn.wordpress.org/dk-pricr-responsive-pricing-table/trunk@1000738 b8457f37-d9ea-0310-8a92-e5e31aec5664
modified readme, again.

git-svn-id: https://plugins.svn.wordpress.org/dk-pricr-responsive-pricing-table/trunk@1000745 b8457f37-d9ea-0310-8a92-e5e31aec5664