updating readme

git-svn-id: https://plugins.svn.wordpress.org/videonab/trunk@976769 b8457f37-d9ea-0310-8a92-e5e31aec5664
updating readme

git-svn-id: https://plugins.svn.wordpress.org/videonab/trunk@976770 b8457f37-d9ea-0310-8a92-e5e31aec5664
updating readme

git-svn-id: https://plugins.svn.wordpress.org/videonab/trunk@976771 b8457f37-d9ea-0310-8a92-e5e31aec5664