- replaced the various crates with a single one
- replaced the Blender add-ons with a single one
- this is an alpha release !
- for features etc see the various docs
* added filtering out of invalid components/ custom properties:
* includes filtering out of invalid / disabled components as defined in bevy_components, components_meta etc
* completely changed handling of "unique" (non blueprint) objects by copying them instead of moving/renaming them & manipulating their custom properties : much cleaner, much simpler !
* disabled default gltf export of optimised animations
* added tests !
* closes#139
* closes#141
* closes#142
* closes#146