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/races/drow.md

@@ -59,9 +59,9 @@ Sees heat signatures up to 60', even in total darkness.
 
 ### Innate Magic
 
--   From 2nd level, can cast [darkness](/spells/light.html#darkness) once per day.
--   From 4th level, can cast [detect magic](/spells/detect-magic.html) once per day.
+-   From 2nd level, can cast [Darkness](/spells/light.html#darkness) once per day.
+-   From 4th level, can cast [Detect Magic](/spells/detect-magic.html) once per day.
 
 ### Light Sensitivity
 
--2 to attack rolls and -1 to AC when in bright light (daylight, _continual light_, etc.).
+-2 to attack rolls and -1 to AC when in bright light (daylight, _Continual Light_, etc.).