Add time system
Time system was missing. This is needed for count_time
/ exposure_time
This also fix some remaining wrong melt between MetricSystem
and EnergySystem
which was used to ease retrieving units.
Edited by payno
Time system was missing. This is needed for count_time
/ exposure_time
This also fix some remaining wrong melt between MetricSystem
and EnergySystem
which was used to ease retrieving units.