Adds referee screen and deities.

Updates bestiary with links to nonhuman racial modifiers.

src/pages/bestiary/wizard.md

@@ -27,6 +27,7 @@ A magic user, often in robes, who memorizes spells from their spellbooks.
 
 -   **Leader**: 50% chance groups of 4+ are led by a higher level wizard (1d4 HD higher). Roll or determine spells as needed.
 -   **Spells**: 1d4-1 spells available (determined by level).
+-   [**Non-human Modifiers**](./nonhuman-modifiers.html): Non-human wizards may have additional abilities or modified statistics.
 
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