[DISCUSS] Add a Session Management infrastructure for extension developers

[echarles]

For various usecases (Realtime collaboration, Multiuser, Kernel Gateway HTTP Personality), it will be needed at some point to have a Session Object binded to the HTTP client (browser or software).

In other languages, this is typcially done with a session cookie.

Not sure how Tornado implements this.

https://pypi.org/project/torndsession/ https://github.com/cole/tornado-sessions