'Save commit', not verified at all.  I have added 'KLWood_actscatrat' function, expanded 'KLrxi_point2' function which the previous calls, added precomputing of 'Coscat' and 'Coabs'.  I need to run verification tests on all of this work, and consider precomputing the average scattering xs and average absorption xs now used in 'KLrxi_point2'.