Adds referee screen and deities.

Updates bestiary with links to nonhuman racial modifiers.

src/pages/bestiary/cleric.md

@@ -26,6 +26,7 @@ Holy (or unholy) warrior-priests on a quest for their deity.
 
 -   **Leader**: Groups of 4+ are led by a higher level priest or cleric (1d4 HD higher). Roll or determine spells as needed.
 -   **Weapon Restrictions**: Lawful clerics may only use [weapons](/rules/combat.html#weapons) with the _Blunt_ trait.
+-   [**Non-human Modifiers**](./nonhuman-modifiers.html): Non-human clerics may have additional abilities or modified statistics.
 
 ### At Higher Levels