the great relocation
cleanup
reinvented collections, switched ids to uint
observers
entity system and various file merges
more merges, renames and corrections
cleanup/notes
replaced /math with go-gl/mathgl
renamed scene, added todos for render/spatial
fixed orthographic splash screen
annoying little bug found!
Merge remote-tracking branch 'origin/feature/use-mathgl' into feature/engine-less-ecs

Conflicts:
	game/components.go
	game/spatialsystem.go
Merge remote-tracking branch 'origin/feature/engine-less-ecs' into feature/ecs