Now we can see where each object is (there's no way to tell them apart
yet.) The rendering is also extremely inefficient, so don't be surprised
if it slows down on your computer.
The sphere doesn't look correct (bad vertex stride) but that doesn't
matter. I need to expose the object's transform in libphysis next,
before we can start drawing.
This now loads the various LGB names I know of when opening a map in the
editor, and they are properly categorized in the object list widget. The
next step is drawing these in the view or adding a property pane.
