Generate functions for operating on a list of shader math functions

[gkjohnson]

abs, sin, clamp, etc

Can use the UnityEngine.Mathf library and just run all components through the associated functions.

Reference

https://msdn.microsoft.com/en-us/library/windows/desktop/ff471376(v=vs.85).aspx

http://developer.download.nvidia.com/CgTutorial/cg_tutorial_appendix_e.html