v2.9.1

Changelog

• Implementing submission lockout mode (in configuration).
• Adjusting ACLs, fixing bugs.

Commits

1057db2 #! v2.9.1
7fde9e8 Adding tests for submission lockout.
7f36309 Introducing optional submissions lockout into the configuration.
97b8a07 Adjusting permissions for student-supervisors, allowing them to send group invitations.
c7f2542 Creating new permission scope for working with reference solutions.
315f551 Bug fix.