[Ifeffit] Athena's new copy series functionality

[Barton, David (DG)]

 Thank you Bruce for implementing the new "Copy Series" functionality
into Athena.  I often wasted too much time and button pushes trying
various Rbkg, Kmin, and/or Kmax values to get a consistent background
subtraction for visual inspection of my datasets.  Now with a couple of
clicks I can create a beautiful series of datasets varying the parameter
of interest to create the overlay that I need to choose the appropriate
background subtraction value.

If you haven't tried this new feature in the latest version of Athena, I
suggest you give it a try...

Dave Barton