readme updates

git-svn-id: https://plugins.svn.wordpress.org/testimonial-rotator/trunk@914401 b8457f37-d9ea-0310-8a92-e5e31aec5664
readme updates

git-svn-id: https://plugins.svn.wordpress.org/testimonial-rotator/trunk@914403 b8457f37-d9ea-0310-8a92-e5e31aec5664
readme updates

git-svn-id: https://plugins.svn.wordpress.org/testimonial-rotator/trunk@914404 b8457f37-d9ea-0310-8a92-e5e31aec5664