Team Membership - Bursaries Team

We have these groups in wafer-debconf:

Permission	Regular Users	Bursary Referees	Bursary Admins
Request a bursary	✔️	✔️	✔️
Edit own request	✔️	✔️	✔️
Accept own bursary	✔️	✔️	✔️
Assign referees to a request			✔️
Score a request		✔️	✔️
Access bursary CSV exports			✔️
Grant bursaries			✔️

Who needs what permissions? Do we need to grant any extra permissions to any of these groups?

Note: due to Django #1891, nobody should be both a Referee and an Admin, because Django Admin's bursary views will break.