Battle Towers Fixes

Minimally invasive fixes for Battle Towers

• Customizable battle towers via config file
• Fixed loot chests with custom loot tables
• Possibility of utilizing namespaced loot tables
• Faster world loading (inspired by VanillaFix, LOL)
• Blacklist for block destruction on tower collapse
• Difficulty persistent tower golems (no despawning in peaceful mode)
• Dimension blacklist/whitelist for Battle Towers world generation and position-file load/save handling

Requires AtomicStryker's Battle Towers and MixinBooter.