Buffering with Vulkan, loading stuff, etc.

Last time we sort of answered "Where'd the vertex shader go?"
In case you missed it:  "Where'd the fragment shader go?"
	Ray Generation Shader mostly, also kinda hit and miss shaders

So how about that shadow ray part?
	I feel like somebody should write a poem about shadow rays
	What if we comment it out?
		The shadows go away...
	miss index and how'd it ever find that
	So the hit shader invokes a trace
	"regular" rays come from the camera
	Zac's question:  Seems generally only one acceleration structure
		traceRayEXT seems to assume only one

How is the compute shader invoked, anyway?
	About this shared vertex buffer
	Hard to read through the abstraction