fix readme typos

git-svn-id: https://plugins.svn.wordpress.org/tabby-responsive-tabs/trunk@937984 b8457f37-d9ea-0310-8a92-e5e31aec5664
fix readme typos

git-svn-id: https://plugins.svn.wordpress.org/tabby-responsive-tabs/trunk@937988 b8457f37-d9ea-0310-8a92-e5e31aec5664