* updated logic to account for bevy 0.14 changes (animation graph, transitions component etc)
* added back & updated per blueprint animation example to the testing project
* updated matching blend file with new style components
* spawnHere => spawnBlueprint
* added back tagging of Blueprint contents with "InBlueprint" / noInBlueprint
* overall cleanup pass (wip)
* updated simple test to include deep nested blueprint instance within blueprint instance case
* restructured materials handling to use the new logic, removed clutter
* experimenting with solutions to the deeply nested blueprint instances problem
* moved out all obsolete code to "old" folder, keeeping around until all problems are solved
* added hack-ish solution to the "aabb system as post process" implementation
* various minor boilerprate changes
