Minor DofExposer rewrite, create a new post process volume with a higher priority and let the component manipulate that instead of fighting with existing dof handling
DofExposer is now part of the MainCamera prefab and disabled by default, should have no impact on regular gameplay
Fixed several issues resulting from the exposer component using .profile instead of .sharedprofile
Multiple dofexposers in a scene should now coexist peacefully since they don't affect any global state, just modifying a local post process volume