Updated configuration to force basic auth.

Have to have some sort of protection.
Added the group/user list to .gitignore.
Added config for SSL.

Got SSL up and running on the robot pages.
Corrected notification code.

We now handle setting/clearing the robot_id field depending on
whether the notification is for registration or unregistration.
Styling.

Bringing in bootstrap from CDN and played around with the
control panel a bit. Waste of time, really. But it looks
marginally better.