remove some deprecated files & update options-file

HowTo-DefineMaterial.txt

dune-sequential.opts

install-commands.sh

install-commands_release.sh

...ed_code/30-8-22_TestingFiles-Comments/Cell-Problem-New.cc

...ecated_code/30-8-22_TestingFiles-Comments/Cell-Problem.cc

...d_code/30-8-22_TestingFiles-Comments/CorrectorComputer.hh

...code/30-8-22_TestingFiles-Comments/prestrainedMaterial.hh

...ated_code/31-8-22_prestrainedMaterials/material_backup.py

src/deprecated_code/Cell-Problem_muGamma.cc

src/deprecated_code/cellsolver.parset

src/deprecated_code/cellsolver_backup.parset

src/deprecated_code/computeMuGamma_backup.parset

...lasticityTensor-globalFunctionVersion/Cell-Problem-New.cc

...asticityTensor-globalFunctionVersion/CorrectorComputer.hh

...nsor-globalFunctionVersion/EffectiveQuantitiesComputer.hh

...d_code/elasticityTensor-globalFunctionVersion/material.py

...ticityTensor-globalFunctionVersion/prestrainedMaterial.hh