Changed names of functions in class SALT2Source by removing the word rest, as agreed upon
Changed names of functions in class SALT2Source by removing the word rest, as agreed upon

dannygoldstein/sncosmo,sncosmo/sncosmo,sncosmo/sncosmo,dannygoldstein/sncosmo,kbarbary/sncosmo,dannygoldstein/sncosmo,kbarbary/sncosmo,kbarbary/sncosmo,sncosmo/sncosmo