Add Referee's Tools

Update JS, add versioning (for cache-busting updates)
Clean up a bunch of unused files
Add Rivertail community
Add some new races

src/pages/rules/magic.md

@@ -17,6 +17,8 @@ When reality is altered this way, it's called magic, and the characters who can
 
 Each spellcasting class has an associated type of magic: arcane or divine.
 
+There's an additional class of spells known as rituals, which have their own requirements, and (in many cases) need not be performed by a spellcaster.
+
 ### Memorizing Spells
 
 Takes one hour, can only be done once per day.
@@ -38,8 +40,12 @@ Ritual spells may be cast by performing the ritual as described.
 ### Spell Effects
 
 -   Some spells affect multiple targets, either by area or by Hit Dice total. If the spell doesn't say how to select the targets, the referee decides.
--   Some spells require the caster to concentrate to maintain the spell's effect. Performing any other action or being distracted (ex: attacked) causes concentration to end.
--   Multiple spells cannot increase the same ability (e.g. bonuses to attack rolls, AC, damage rolls, saving throws, etc.). Spells that affect different abilities can be combined, just as spells can be combined with the effects of magical items.
+-   Some spells require the caster to concentrate to maintain the spell's effect.
+    -   Performing any other action causes concentration to end.
+    -   When distracted (ex: attacked) while concentrating, the spellcaster must make a Willpower check (highest of CHA or CON) or the spell ends.
+-   Multiple spells cannot increase the same ability (e.g. bonuses to attack rolls, AC, damage rolls, saving throws, etc.).
+    -   Spells that affect different abilities can be combined.
+    -   Spells can also be combined with the effects of magical items.
 
 ### Magical Research