#190 - Permissions

[mlencki]

This should close #190

New edit permissions form is available through users section

Instead depending on roles in authorization, we're now utilizing permissions using laravel-permission package.

Old roles are still available in user creation & edit forms. They're used to initialize the default set of permissions for each role, which can later be modified in the new edit permissions form.

php artisan toby:sync-permissions should be run after deployment to migrate current roles to permissions and php artisan db:seed --class=PermissionsSeeder to seed permissions.

[EwelinaSkrzypacz]

Please add in pr description what commands must be invoked for the application to work.