Added a Zero Trace facility to all Parameter dialogs.  The user can select specific polygons whose trace will be set to 0.
Changed a user message concerning the Calibration file to use new location.
Veris will no longer save the Calibration file at exit.  The file will still be saved after calibrations are made.
Zero Trace facility moved to the Extract Kernel Slice level so it is used for all Trace extractions.