Breaks out Carnivore eating exclusion

Rather than having it show up as a Wheat Allergy.
Shifting

Resets the code to check for banned rather than permissible stuff, and
makes junk food a problem.  Not as bad as ANTIJUNK, though.
Junk+Meat=OK

As requested.  Wheat is still a lockout though, so the meat pizza is
actually inedible for Carnivores.
Pizza fix

Now the Carnivores can enjoy their meat pizza.
New irradiated fruit can spawn. New irradiated fruit can be used in the normal fruit recipies.
Merge pull request #8720 from KA101/carniwheat

(Ready) Breaks out Carnivore eating exclusion
Merge pull request #8732 from jeremyosborne/loomofthefruit

New irradiated fruit can spawn. New irradiated fruit can be used in the normal fruit recipes.