Audit Jupyter Project Organization Members

[RRosio]

This issue tracks the feedback that the Jupyter Community provides regarding the advisory policy for Github organization membership auditing.

Currently, this approach involves obtaining public user activities via the Github events API within the last 365 days.

[Carreau]

In addition to what is done in #100, I think the audit should also:

• regularly list all and new members.
• List who invited the member and reason – so that when someone has no activity we know who to ask for accountability.