Remove guest chat ability thanks to https://profiles.wordpress.org/citychatbrush for the idea, Now only logged in users can now chat, I've also updated the main JS file to increase speed.

git-svn-id: https://plugins.svn.wordpress.org/wpbp-video-chat/trunk@1002664 b8457f37-d9ea-0310-8a92-e5e31aec5664