Created SPXFileUtilities with FileExists method
Modified makefile to include APPLgrid configuration and libraries
Created SPXFileUtilities with FileExists method
Created SPXFileUtilities with FileExists method
Added SPXGeneralException to use for generic exceptions, only contains a message
Implemented SPXGrid::GetReferenceHistogram method, added appl::grid *grid data member
Which PDF files correspond with which grid/cross section?