3.1.1

• Fixed crash when vehicles getting unloaded (1.8->1.9)
• Fixed 1.8->1.9 window items translation
• Fixed some item mappings causing the client to crash (1.8->1.9)
• Cleaned up mapping files
• Rewrite enchantment window properties in 1.8->1.9
• Map END_GATEWAY to END_PORTAL in 1.8->1.9
• Fix mob spawner entity data translation in 1.8->1.9
• Don't handle entity properties for holograms (1.8->1.9)