Adds honey material, gives Ursine mutants a small morale boost for eating honey.

The more Ursine mutations you have, the bigger morale boost you'll get for eating honey. Effect starts at 5+ Ursine mutations, as a lot of mutations are shared with other MUTCATS.
Note that it's not a very significant boost, as honey is rare outside of beehives and the bear MUTCAT has Bad Tempered. Much like the Cowbell feature, this PR is mostly for flavor.

In the future, something similar could be added for stuff like giving morale boosts to Beast mutants eating fresh raw meat, would add immersion to different mutation categories and play interestingly when raw meat parasites get implemented!