Fix headless GPU tests + x64

So, that was it.  I'm still worried about Mac and Linux and such, but I'm glad I can run x64 now.

This fixes the graphics tests crashing.  I made sure all the default settings were carried over, e.g. buffered rendering, which may have been causing some weirdness I experienced before.

The results of gpu/reflection/reflection are interesting - it's not clipped right. But it draws something so I declare it working.  The results of my in-progress material test are also interesting (I need to clean it up now.)

-[Unknown]