Create Initial Moderator Group Programmatically

wrote a file (create_groups.py) which allows for the programmatic creation of a group, "Moderators", and assigns the relevant view permissions to User Identifier, Git Lab Group, and Project, as well as Add/Delete/Change/View permissions to Issue and Note.

Created the structure necessary to run from the command line with a manage.py commmand: python manage.py create_groups.

Added relevant documentation to readme file in the setup section.