Software Changes 29-Nov-2017 to Support Calibrated Eventlist (CBE) Normalization

CBE normalization was implemented incorrectly in March 2017.  It is now done correctly, and the correction factors are now available to the user.

The default for cbe_normalize is 0.

To enable CBE normalization: o->set, /cbe_normalize
To disable CBE normalization: o->set, cbe_normalize=0

To retrieve the correction factors: corr = o->get(/cbe_corr_factors)