This was fixed in H-uru/libhsplasma#242 originally, but Win32 APIs seem
to have terrible performance without user mode buffering, which
negatively impacted PRP loading in other tools, such as PRP Shop.
Therefore, the fix was reverted in H-uru/libhsplasma#246. This fixes the
race condition closer to the point of impact using the Win32 stream
introduced by H-uru/libhsplasma#264.
This will allow us to automate releases with the Blender 2.79
"experimenntal nightly" codebase. This is great because the newer
Blender uses Python 3.7 (instead of 3.5). This pulls from my fork of
Blender, which has a number of build improvements added on top.