Working toward easier to read documentation.

All the changes are in doxygen comments.
	modified:   doc/checkexamples.c
Regenerated
	modified:   doc/libdwarf.pdf

	modified:   src/bin/dwarfexample/jitreader.c
	modified:   src/bin/dwarfexample/showsectiongroups.c
	modified:   src/lib/libdwarf/libdwarf.h

Author: davea42