Add a couple tests to matrix code
Change all meshes to cubes to try to debug
Make it easy to try a few different things to try to debug
Add some printing functions

re-implement cross product (no functional change)
Add some test code
Re-order client object files
Fix bug in mat44_x_mat41.  Dammit, why did that take so long to find?
Fixed the transforms!!! They were reversed!

Also now there's only one entity, a starbase that spins
around with the camera pointed at it.  So... not trying to
render the world just yet, but major progress, as now I can
at least render a spinning starbase!