moved rotation to calculator.py...adapted Z and EDI classes

Signed-off-by: LK <LK@uni>
rotation of matrices and vectors incl. error propagation in calculator.py done (and corrected)

Signed-off-by: LK <LK@uni>
propagate_error_rect2polar corrected...still: zerror amplitude  is not properly reflected in PTerror amplitude

Signed-off-by: LK <LK@uni>