add tests

Polypropylene/Experiments_1/PP_DMA_Presentation1.pdf

Polypropylene/Experiments_1/README.md

Polypropylene/Experiments_2/README.md

Polypropylene/Experiments_2/Temperature tensile.xlsx

Polypropylene/Experiments_2/processingCode/1_masterCurve.py

...nts_2/processingCode/2_relaxationSpectrum_leastSquares.py

...lene/Experiments_2/processingCode/3_1__TTSP_GibsonFits.py

...ene/Experiments_2/processingCode/3_shiftFactorCurveFit.py

Polypropylene/Experiments_3/README.md

...xperiments_3/ZT1075_Carbo Brake_Compression_20220607.xlsx

...ne/Experiments_3/ZT1075_Carbo Brake_Tensile_20220607.xlsx

...opylene/Experiments_4/Part1_23_70_cyclic/23C_1-cycle1.txt

...opylene/Experiments_4/Part1_23_70_cyclic/23C_1-cycle2.txt

...opylene/Experiments_4/Part1_23_70_cyclic/23C_1-cycle3.txt

...opylene/Experiments_4/Part1_23_70_cyclic/23C_1-cycle4.txt

...opylene/Experiments_4/Part1_23_70_cyclic/23C_1-cycle5.txt

...opylene/Experiments_4/Part1_23_70_cyclic/23C_1-cycle6.txt

...opylene/Experiments_4/Part1_23_70_cyclic/23C_1-cycle7.txt

...pylene/Experiments_4/Part1_23_70_cyclic/23C_1-summary.txt

...ylene/Experiments_4/Part1_23_70_cyclic/23C_1-summary.xlsx