multi-user

The notebook has its own internal idle-culling mechanisms, including shutting down idle kernels, shutting down itself when there's been no activity, and making decisions based on whether there are open connections or not. This is a lot more sophisticated, and offers much more granularity than the network-activity-based activity we have now.

For reference, we enable this config [on mybinder.org]

Add the option to have a notification sound for any text message, and one for any text message on UNICOM.

We need to get a better sense of bandwidth requirements for this framework. Areas to document:

• What is the max number of users possible within one space before things slow down?
• How much bandwidth does each world require?
• How does this system perform in low bandwidth environments?