GeneratorCraft - Lootboxes, Gambling, RNG, Economy

Changes:

• Changed some sounds in the Lootbox opening animation sequence
• Changed Money Sheep's mob behavior to be tougher
• The Tutorial Book will no longer be given every time you join the world, only the first time

Fixes:

• Fixed disabling GC Level sound not working on the +1 XP bar message
• Fixed Wealthy Creeper, Skeleton and Zombie models and behavior to be exactly like their vanilla counterparts
• Fixed some internal bugs with the /loan command, along with no longer letting you repay more than you are indebted
• Removed unused/scrapped parts of features
• Fixed the Greed Sword and Crown coin counts being weird when really high
• Backend code improvements