Cache all spellbook tabs

Resolves #115

Author: nebularg

.luacheckrc

@@ -38,6 +38,7 @@ globals = {
 	"GetItemCount",
 	"GetItemIcon",
 	"GetItemInfo",
+	"GetNumSpellTabs",
 	"GetPlayerInfoByGUID",
 	"GetPVPRankInfo",
 	"GetPVPSessionStats",

Data/Cooldowns.lua

@@ -81,8 +81,8 @@ end
 function module:ResetSpells(e)
 	wipe(spells)
 	wipe(spellCooldowns)
-	-- cache spells from our current spec plus racials
-	for tab = 1, 2 do
+	-- cache spells
+	for tab = 1, GetNumSpellTabs() do
 		local _, _, offset, numSlots = GetSpellTabInfo(tab)
 		for slot = 1, numSlots do
 			local index = offset + slot