Private Groups at 80%, almost ready for live deploy

So users are added to rooms when they login, the divs & userlists all
work and notifications are fine. Next I need to add the 'reject' option,
and work on the visual feedback and customization options for a group,
plus the admin privileges in terms of member removal / blocking, etc.
Really close to being ready for live deploy, not including a likely
re-jig of the layout.