Config Documentation

@jan.dinkelbach @l.razik There are some config options in the config.cfg where the purpose is unclear:

input_directory_path: is read in the ConfigManager.fs.input_path but never used Line 364
system.label: not sure what this does and how much documentation is needed used in the Constructor of the system Line 42
single_phase: i guess this option set defines for each component if there should be an annotation added and some transformation data? Always calls SET_TRANS_EXTENT exemplary Line 1072 Makro is defined at Line 6

The current state of the documentation of the config. Is this detail level enough or should i be more specific?

Edited Jan 26, 2021 by Achim Klaus Völker