Add utility function to check if the user is authenticated and if he/she is an admin
Add a specific decorator to ensure only some endpoints are accessed by admins
Forward the `is_admin` variable to all pages so that we can behave accordingly
Only ask FAS for the admin groups, no need for the other ones
Add method to retrieve a specific release (specified by its release numnber) from the DB
Add a dedicated form to create or edit releases
Add a dedicated template that we can use to edit or create releases
Add a new endpoint to create new releases
Add endpoint to edit existing releases
Adjust the index page to add link to create and edit releases for the admins
Activate the decorator to restrict the access of the admin endpoints to admins only
Specify the default FAS admin group that will contain the admins of the application