Clean up some obsolete assets
Tweaks to default assets
Reorder functions for consistency
Reorder classes for consistency
Apply geom transform to plane equation

This enables editing of a non-placeable geom.
Disable the shadow border clamp

For now. It was conflicting with texture wrapping because it's not careful
about which texture unit it operates upon.
Fix plane entity load

Was creating a sphere geom because I copy-pasted the sphere code.