[After 2.0] - solve copy issues
- rm Flags.history auto-copy
- added copy-kw to History.reindex + adjusted tests for that
- shallowcopy in _sliceHistory
- added
__deepcopy__
and__copy__
andcopy(deep:bool)
consistently to History, Flags, Saqc
saqc now return a shallow copy after any call of functions
Edited by Bert Palm