Starfield Builder (Iteration 2)

As part of the directx 11 port, I've finally revisited the starfield generator.  There isn't much new in this version, as it was mostly just porting dx9 to 11, but it finally draws textures on the quads for the stars, and colorizes them to match the actual star color.

The colors are very subtle, but still noticeable.  I'd rather have them that way, to be honest, instead of being obnoxiously in-your-face.

A simple re-write, but the results look much better!