edit readme.txt

git-svn-id: https://plugins.svn.wordpress.org/coming-soon-page/trunk@1021127 b8457f37-d9ea-0310-8a92-e5e31aec5664
edit readme.txt

git-svn-id: https://plugins.svn.wordpress.org/coming-soon-page/trunk@1021130 b8457f37-d9ea-0310-8a92-e5e31aec5664