readme.txt update

git-svn-id: https://plugins.svn.wordpress.org/pricingtable/trunk@970590 b8457f37-d9ea-0310-8a92-e5e31aec5664
readme.txt update

git-svn-id: https://plugins.svn.wordpress.org/pricingtable/trunk@970593 b8457f37-d9ea-0310-8a92-e5e31aec5664