Since sequence resolution is provided to the nodes now, it no longer needs to be a global in the shaders
Removed some unused shaders
Added default params to ShaderCode to allow skipping types that aren't used
The nodes now have more control over how their accelerated shaders/sample
functions are run, as well as how items are popped off the value tables.
This allows for various optimizations that we didn't have access to before.
Results are identical (tested with Olive 0.1.x). Using a straight multiply is faster if the compiler doesn't optimize pow(). It's also safer because with pow(), [the result is undefined if x<0 or if x=0 and y≤0](https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/pow.xhtml).
itsmattkc
BrimsonBhin
Simran Brucherseifer