Develop confirmation test suite

[ngraymon]

z_t_symmetric_equations.pdf

[ngraymon]

mentioned in commit 6eb980d581ddfa093798f56c0e7e6a0d46245c71

[ngraymon]

This might have to be moved to milestone v2.0 if its too complicated

[ngraymon]

a template pytest folder was layed out in commit 97deff0b5ec72f36458a89c4febe6d9e0e0cd061

[ngraymon]

The purpose of this issue is to create a new test (pytest) suite (meaning multiple tests contained in a folder run with -k arg) whose purpose would be to prove to the user that the program is generating mathematically correct prefactors and terms.

This test would generate *.tex output files that are compared to files already present in the latex directory which have been verified as being theoretically correct.
This way any researcher can review the pdf files and convince themselves that the generated terms are correct.
They can manually compile the .tex files inside the latex folder and the pytest makes sure that the generated .tex output exactly matches what is already present in the latex folder.