Updating readme file

git-svn-id: https://plugins.svn.wordpress.org/nelio-ab-testing/trunk@905634 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updating readme file

git-svn-id: https://plugins.svn.wordpress.org/nelio-ab-testing/trunk@905635 b8457f37-d9ea-0310-8a92-e5e31aec5664