[Bf-codereview] Hue Saturation Value Node for Cycles (issue 5447073)

[brechtvanlommel at gmail.com]

LGTM. fmod is more correct if you get values further away from 0/1.
Regarding multithreading, that doesn't matter here, all threads render
different pixels, the node graph is evaluated entirely by one thread
always.

http://codereview.appspot.com/5447073/