update w/ new readme.txt text 2

git-svn-id: https://plugins.svn.wordpress.org/schedulista-shortcode/trunk@913546 b8457f37-d9ea-0310-8a92-e5e31aec5664
update w/ new readme.txt text 3

git-svn-id: https://plugins.svn.wordpress.org/schedulista-shortcode/trunk@913548 b8457f37-d9ea-0310-8a92-e5e31aec5664