TL: first revision for the parallel SDC theory paper (#481)

* TL: dump version

* TL: added MPI script for pSDC theory paper

* TL: adapted script for parallel computation

* TL: minor detail for output

* TL: mini-fixes and black

* TL: update for plots

* TL: upload reference data from jusuf runs

* TL: minor modifications

* TL: prepared PR

* TL: fix linting error

* TL: added missing dependency for project tests

* TL: another detail

* TL: eventually <=> finally apparently