copygirl's Wearable Backpacks

• Made an entire GUI framework ...
• Rewrote the config GUI in said framework ...
• Just so you can configure the new config settings nicely! (Video)
  • Chance of default mobs spawning with backpacks can be adjusted
  • New entries can be added with custom chance, loot table and color
  • Custom mobs, including from other mods, can be configured to wear backpacks
• Probably fixed an issue where config changes ingame didn't get saved
• Hopefully didn't introduce any new issues
• Fix mobs from mob spawners spawning with backpacks (#47)
  • ..and add it as config setting spawnFromSpawners instead!
• Improved how backpacks render in item frames - Thanks @InsomniaKitten! (#50)

Localization

• Added Spanish, Mexico (es_MX): @Dorzar (#46)
• Updated German (de_DE): @Vexatos (#58)
• Updated Chinese, simplified (zh_CN): @TartaricAcid (#59)
• Updated Dutch (nl_NL): @TDarkShadow (#60)
• Added Danish (da_DK): @Zerotiger (#55)
• Added Italian (it_IT): @Insane-96 (#51)
• Updated Russian (ru_RU): @raspopov (#61)
• Updated Portuguese, Brazil (pt_BR): @eduardogomesv (#62)