Template:Spell and unpurchasable Scroll list by Class

Purpose

 * Display a list in table format for all spells associated with a particular class
 * Each row will contain :
 * Spell name
 * Level of the spell for the class
 * Scroll that exists for the spell
 * Vendor(s) that exists for the Scroll

Categorization

 * Add page to Pages with invalid template arguments category if any parameter value is identified as invalid