Close to done

Things I did:
* Move video_page to use AJAX instead of server_side am_i_online check, to avoid server hanging while waiting for connection timeout
* Add a check for "online" in status.
* Fix central server host parsing, so we don't get multiple ports

Things that need to be done:
* Fix the cross-site scripting error when visiting easyadmin page.  NOTE that this should be working, as far as I can tell; I assume it's some config issue?  I had the same problem during the hackathon, had to work around it.  But the jsonp code looks good, it's just not allowing the jsonp for some reason.