Adds code generation with dependencies into CMake. If generated files are missing or out-of-date, they will be automatically generated, in parallel, during build step (make).

python is required all the time to build.

For a few files, the s, d types were generated from z but the z file was never used. It's simpler to add the d files, generate s from d, and remove the unused z files.

It seems recent python versions are more picky about strings, warning about invalid escape characters. Use r raw strings as required.