Manifest version 21

• Fixed aether (buggy mobs + incompatibility with ebwizardry)
• Misc structure changes: improved generation, new structures

Manifest version 20

• Fixed aether (buggy mobs + incompatibility with ebwizardry)
• Misc structure changes: improved generation, new structures

Manifest version 18

• Tweaked some structures (fixes stability)
• Fixed crash with interaction of Mo' Bends, WAASL, Twilight Forest

Manifest version 17

• Added more structures
• Tweaked ebwizardry (books are consumed)
• Minor edit shader default settings

Manifest version 16

• Minor edit readme
• Fix metadata on structures