Support Curios and Baubles API. Hats should only be rendered when in Minecraft Head slot.
But the hats should be active when they are in a head slot of Curios or Baubles.
This option should be deactivateable because it could be overpowered when there are more than one additional slot.

Curios API: https://github.com/TheIllusiveC4/Curios/wiki/How-to-Use:-Developers
Baubles API: https://github.com/lazyMods/Baubles/wiki/Intro

Curios support implemented
Baubles has some problems and support will not be added for now