Lightman's Currency

-Added two custom villager types with their own unique sets of trades that allow you to make purchases with coins.
-Banker: Sells various trade-related items. Block: ATM (allows two bankers per ATM due to the multi-block nature of the machine).
-Cashier: *Sells most items that are sold by vanilla villagers, but you pay for the items with coins instead of emeralds. Block: Cash Register.
-Modified the Armor Stand Display trader to properly maintain its trade limitations for the first 4 slots should they be removed and re-added via the creative trader functionality.

*Disclaimer: I have attempted to copy over the trades with an approximately appropriate price (albeit significantly cheaper than just setting the cost in an equivalent amount of emerald coins), however some trades that have randomized or calculated costs may end with strange results, so please report these issues as you see them. Also, trades that would normally require emeralds + item (namely the enchanted book purchases), no longer require the additional book and are sold for pure cash.

**Neither the banker nor the cashier will generate naturally in villages as I have not yet added structures to the villages with houses that spawn with ATM's/cash registers. They will, however, still transform into a villager of these types should you place an ATM/Cash Register near an unemployed villager.