rewording of readme

git-svn-id: https://plugins.svn.wordpress.org/embedplus-for-wordpress/trunk@895219 b8457f37-d9ea-0310-8a92-e5e31aec5664
new version

git-svn-id: https://plugins.svn.wordpress.org/embedplus-for-wordpress/trunk@895348 b8457f37-d9ea-0310-8a92-e5e31aec5664
trunk edits

git-svn-id: https://plugins.svn.wordpress.org/embedplus-for-wordpress/trunk@895373 b8457f37-d9ea-0310-8a92-e5e31aec5664