Increase default image width.
Increase thread granularity and re-add progress meter.
Add the x64 architecture to the project file.
Add image multi-sampling.
Switch to the xorshift128+ PRNG
Remove triangle pixel filter. Looks worse than box.
Micro-optimize camera ray calculation.
Detect NaNs in output and mark them with bright magenta.

Also fix two division-by-0 issues in XYZ<->xyY conversion routines.
Move Rng into libyuriks
Unify scene lights, objects and light transport.