Update readme compatibility info for WP 4.0.1

git-svn-id: https://plugins.svn.wordpress.org/toopher-two-factor-security/trunk@1036746 b8457f37-d9ea-0310-8a92-e5e31aec5664
Take BETA out of the name

git-svn-id: https://plugins.svn.wordpress.org/toopher-two-factor-security/trunk@1036749 b8457f37-d9ea-0310-8a92-e5e31aec5664