default save as .csv instead of .txt
more robust make set and apply settings test
preproc creation should be silent
signal unit tests out of general & more separate
removed dead code from signal
path robust against reordering of unit tests
drop unit tests out of general & more separate
remove useless testing
drop_set unit tests out of general & more separate
calculation_collector unit out of general
unit_general to unit_other (more descriptive)