* removed clutter
* moved hot reload to seperate module
* added back "assets loaded" event, removed useless events
* registered HideUntilReady component for users
* minor tweaks & cleanups
* 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
