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Ian Bell 267d64533a Superancillaries for pure fluids (#2511)
* Expansions are fully wrapped, looking good. Next step is the set of expansions that is the 1D approximation

* Get 1D approx working via cython

* Count solutions

* SuperAncillary class is working

>1000x speedup for water
Time for C++!

* Superancillaries are working!

In C++, speedup is more than 2000x. In Python, more like 150x because of Python <-> C++ overhead

* Add pmax check for PQ superancillary calls

* Update tests

* Allow T limits to be obtained

* Implement get_fluid_parameter_double for getting superanc value

* Add tests for getting parameters from superanc

* Script for testing superancillaries for sphinx

* Microoptimizations; don't help speed

The limiting factor remains the clear function, which takes about 30 ns

* Add R125 superancillary

* Use the release from fastchebpure for the files

* Drop a .gitignore in the unzipped folder

* Update superancillary injection script

* Turn on superancillaries by default

* Missing header

* Many int conversions in superancillary

* Another int cast

* More annoying solution for boost iter max

* Fix warnings

* One more warning

* Clear up the calculation of rho

* Update docs_docker-build.yml

Use arm64 since the containers were built on mac

* Superfluous ;

* Update backend.py

* Get the critical points working for superancillaries

* Fix wrapping changes of xmin&xmax methods

* squelch warnings

* Version 0 of jupyter notebook for docs

* Try to add the notebook to the docs

* Add jupyter notebook for superancillary

* Lots of updates to superancillary notebook

* More updates to docs

* Skip pseudo-pure for superancillary docs

* Fix output of superancillary figures

* Add superancillary plots to docs for the page for each fluid

* Make a placeholder figure for fluids without superancillary

* Add superancillary plots to task list

* Bump to release fixing m-xylene

* Relax the location of the REFPROP stuff

* Change default name for R-1336mzz(E)

* No need for figures to be so large

* Don't need REFPROP setting

* Bump to fastchebpure release with methanol

* Benchmark caching options

* Benchmark more granularly

* Add the fast methods to public API for HEOS class

* Back to memset - can memset with 0 but no other value

* Fix how caching is managed in Helmholtz class

* Close to final implementation

Perhaps a tiny bit more optimization possible?

* Update function name

* Make message more accurate

* Fix init order

* Expose update_QT_pure_superanc to Python

* Fix when _reducing is set for pures

* Fix the post_update

* Indent

* Notebook

* Notebook

* Make ln(p) construction lazy

Only really matters for debug builds

* Also make reference non-const

* Inject superancillary for methanol

* Make the superancillary loading entirely lazy in debug

* Fix PH bug for Nitrogen

 Closes #2470

* Force the clear to be called on SatL and SatV

To invalidate them at start

* Default is non-lazy superancillary loading

* Add CMake option to have lazy-loading superancillaries [skip ci]

Not a good idea unless doing very narrow testing
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