Reintegrated readygraph features

git-svn-id: https://plugins.svn.wordpress.org/subscribe2/trunk@937414 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updated Readygraph Description - ReadMe.txt

git-svn-id: https://plugins.svn.wordpress.org/subscribe2/trunk@937415 b8457f37-d9ea-0310-8a92-e5e31aec5664