Fixes matrix frame not having a model (the block is transparent though).
Don't register an item model for the invalid part anymore.
Make variant registration for items more explicit.
This fixes#5
- Refactored boostrap code:
* Completely reworked item/block/tile registration.
* Fixed server side startup.
* Fixed server side startup.
* More documentation.
* More heavy cleanup
* More cleanups.
* Major refactoring of state mapping and fixes a lot of other issue related to item rendering.
* Fixes sky chest item models (no item TESR).
* Only use CachingRotatingBakedModel for tile entities automatically.
Fix default rotation of quartz pillar for item model.
* Used method reference instead of lambda for ItemMeshDefinition for multiparts.
* Removed unnecessary IHasSpecialItemModel
* Removed unused IconReg class.
* Updated resource pack version.
