moving into customizing header for admins
basic admin vs regular user header differentiation
additional cleanup
Significant updates

- Added authentication in both views and controller for actions that
photographers should not be able to access, like creation, updating,
deletion. Also limited the amount of links, etc. that photographers see.
- Some visual cleanup
Updating the navigation buttons on Show screens

Removing “Delete” and “Edit” buttons from photogpraphers’ Show views on
Games
Also fixing the href on the “Back” buttons