Added video link to readme.txt.

git-svn-id: https://plugins.svn.wordpress.org/me-widget/trunk@964436 b8457f37-d9ea-0310-8a92-e5e31aec5664
Added video link to readme.txt.

git-svn-id: https://plugins.svn.wordpress.org/me-widget/trunk@964437 b8457f37-d9ea-0310-8a92-e5e31aec5664