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* Deprecated the old C extension. This greatly simplifies the build system, but for now, disables EnergeticsBasicOld.
* Moved to a setup.cfg and pyproject.toml build system with setuptools.
* Created a new package, stickydesign-accel, that contains Rust extensions to accelerate the newer EnergeticsBasic. When installed, this gives a significant (around 20x, I think) speedup.