add first round bounding boxes
add aabb util
add support for automatically resizing world box
remove unused module
swap cullface direction

basically, let's toggle the faces culled based on whether the
camera is inside the bounding box
fix torus bounds calc
cleanup aabb
remove overloaded .bounds prop
more demo, center camera on bounding box
update zoom control to be based on bounding box
hoist bounding box compute out of the render loop