DataLoader for recognising C/C++/Fortran (C-C-F) source files.
It also defines an innerclass, CndFormat, whose derived classes are
used to format template files (e.g.
Recognizes .h header files and create .h data objects for them
This data loader recognizes .h header data files, creates a data object for
each file, and sets up an appropriate action menus for .h file objects.