Fixes:
- Fixed Player Head Names
- Massively optimized ItemStack building. Shed almost 1000 lines of code.
- Massively optimized sell price ItemTable building.
- Selling not properly translating legacy item names with newer names.
- Purchasing items not properly building legacy item stacks with newer names.
- ItemFlags incorrectly resolving from config.

Enchanced:
- Selling is now able to determine multiple sell prices for the same item type, depending on:
Enchantments & Enchantment Level, MobType, Custom NBT, Material, SkullUUID, Potion Type & Strength.
- Added Multi-Threaded Configuration loading to correct error logging when an error is in a specific configuation file.
- Added Sell Price to items in Quantity Selection Menu
- Added option to disable Skull UUID checking when selling a head.
- Added item-flags to Dictionary.
- Added Example Config Formats to Dictionary Pages.
- Added Auto-Shop Resizing.