Include a PDF field for spells

spell.rb

@@ -13,7 +13,8 @@ class Spell
 					:reaches,
 					:adds,
 					:rules_text,
-					:cost
+					:cost,
+					:pdf
 
 	attr_accessor :authors
 
@@ -37,7 +38,8 @@ class Spell
 		rules_text:,
 		authors:,
 		adds: [],
-		cost: nil)
+		cost: nil,
+		pdf:)
 
 		@death = death
 		@fate = fate
@@ -59,6 +61,7 @@ class Spell
 		@authors = authors
 		@adds = adds
 		@cost = cost
+		@pdf = pdf
 	end
 
 	def primary_arcanum